I'm not familiar with the immigration system of too many other countries. But for the UK this is masking a lot of major differences between visas. For instanc

I'm not familiar with the immigration system of too many other countries. But for the UK this is masking a lot of major differences between visas. For instance, the Tier 2 visa requires an employer to sponsor it. The visa is then tied to that job. That employer needs a license, et cetera. Whereas the tech nation visa allows someone to come to the UK without a job and look, and then change jobs easily.