What, um, is the job? The yellows were assuming some sort of office information-handling job and the greys were assuming security and the orange thought something involving people's medical data or personal lives or something.

The job is learning a form of magic - the interviewer can demonstrate - and then participating in further spell development and the creation of magic artifacts. The interviewer is...sorry they were confused? Past experience really isn't relevant or they'd have listed what kind of past experience they wanted, the only thing they need is people who won't go telling all their friends that they do magic at work.

At that point most of the greys figure this isn't their thing but one stays, as do all the yellows and the orange.

And everybody who told no lies on the interview can get Wizardry 101, refined from the Elendil curriculum and compressed to reflect being a full-time job instead of a university course. The confidentiality agreement includes promising not to demonstrate or teach magic to anyone, though you can of course recommend them this outrageously well-paid job! 

(The hiring manager wonders if the pay is the reason no purples applied, and lists a manufacturing/production of confidential widgets confidentality very important job at a tenth of the salary in the same listings).

(That one gets purples. And a curious green.)

They can get the same interview.

The green's curiosity is satisfied when she finds out it's magic. ...she kinda wants to learn the magic but her parents will be ashamed of her if she makes that little money.

Sigh. "We could put out an ad tailored to greens with a salary to match?"

"It sounds like a green job to me, I don't know why you didn't do that in the first place."

So they put out an ad for a research position, very confidential, very good pay.

Greens apply!

The hiring manager writes a best practices document for hiring stupid rainbow people and waits to see whether some castes actually do better at Wizardry 101.

The greens do. The yellows aren't bad. The grey who stayed is doing pretty well, the orange is having a hard time, the purples are a really mixed bag and some of them turn out to be literally not smart enough to do wizardry.

...he can buy them Earrings of Intellect +2 and eidetic memory necklaces for the difference in what he's paying them. And it'll get the regulators back home off his back about how differential pay in a caste system looks sort of like differential pay by gender which is illegal in their world. 

The earrings close the gap for some but not all of the struggling purples.

Fancier ones are outrageously expensive, unfortunately. ...he buys the best purple pupil a +3 anyway, because then they'll be among the best of the greens too and he'll find this enjoyable. He refers the people who can't make it to a colleague who's doing the same thing with divine magic.

Some of them do better with divine magic, especially the orange.

Vanda Nossëo member standards for law enforcement are some of the hardest for most countries to meet, so they have a transition team over to help with that part in particular. They recommend societies vying for membership actually separate the law enforcement and the public safety aspects of policing; public safety officers are either like paramedics and have a job of getting to problems quickly and keeping everyone safe, or like social workers and have a job working with communities and identifying potential problems. They get stun weapons. Law enforcement does not carry weapons at all, except for a small team with tons and tons of training whose job it is to make arrests with as little force as possible; they write tickets and investigate crimes. Separating it out like that really helps with keeping incident rates low enough for membership. 

Greys who do not think this sounds like fun might be interested in helping this station field some competitive zero-gravity sports teams? Zero-gravity practice and competition arenas are set up for this.

Greys are interested in the sports. Some of them find stun weapons satisfactory. A few of them try forming a private security company for anyone who finds the law enforcement unreassuring.

That's allowed but if they assault people they get prosecuted for assault. A membership bonus is astonishingly reliable forensics.

A tourism industry gets off the ground!! Marketers show up to figure out how best to sell the station as a tourism location to their various populations. It helps that it's amazingly pretty and that the locals are the right amount of exotic. Have they considered selling food for way more than they're currently selling it for, seriously, tourists will buy anything. A bunch of shops spring up selling servants and Hex stuff and Edda's astonishing diversity of goodies and Arda artifacts and a hundred other things from a hundred other worlds. There's a Stork pet shop that offers the best pets. There are exotic restaurants; the surviving ones are not too exotic. One day there are Andalites grazing in the central park.

There's a teleporting shuttle service around member states; they look at traffic and decide to work the new place into the schedule hourly.

Food prices go up and snacks start coming with little blurbs about the recipe history and ingredient sourcing and chef authenticity and stuff. The Andalites are fascinating. It gets easier to hire the locals when there is so much shit to buy.

A constitution gets hammered out and put up for vote! The status of the internet, health care, a twelve-second emergency response time, and resurrection as fundamental rights can be debated by a population all of whom get one vote on it.

The purples are excited about that. The purples want the internet. They really really want there to be the internet. They like their internet fast, and uncensored, and fast, and also fast. Several people want resurrections, although the people selected for the station skew kind of young and are not close to that many dead people. The interim administrator puts in a request for her grandfather.

Once the membership is approved that should be no problem! Most places distribute their allotment of immortality necklaces and resurrections by sale but some do it by lottery. Internet is set up. It is so fast. Screened first-responders can go down to Wish to be part of a batch that gets a local teleport; they also get to pick up whichever of divine or arcane healing they have more aptitude for. The Vanda Nossëo transition team sets an ambitious set of goals for the year: crime rate half that of any on their planet, due to faster response times and that knowably perfect forensics, one or fewer police excessive-use-of-force incidents, and an unemployment rate "so low that the economists yell at us an unemployment rate that low is actually bad for the economy."

The station is more comfortable with purchasable necklaces and immortalities; somehow everybody thinks they'll come out ahead (the purples make the lowest median amount of money but most of the very richest people in the world are purple - magnates of assorted consumer good industries). The population was selected for not having criminal records and they can probably manage the crime rate thing on that alone. They were expecting to have to finagle most of their own economy and the employment rate is already really high with all the extradimensional jobs that are pouring in.