The visas cost quite a lot - in application costs, time to collect documents, cost of tests, etc. And I mean likely a full month or more of a hairdresser salary kind of cost. On top of that you'd need to provide a documentation of both a degree and relevant work experience for the last 10 years just to check if you qualify. Then you get the history and references checked, so that needs to pass as well.

For the company organising such fraud, it would likely be a lot less hassle to take a local person and teach them 1-to-1, full time for a month. And considering you may end up sponsoring someone without skills to come and work for you essentially illegally - what's the point?

Also for the person seeking that position: if you're found out, you'll likely never get a proper visa. That a big risk to take.