Already disproved it (and many many many others), First 4 years of my relationship spent living in different countries. After college we moved in together.
I think proximity is only a small part of it at least in a Facetime enabled world.
According to a website "efinancialcareers" or something, I think first could be getting £90k, and that before the bonus. And yes that is very IMO but in their career trajectory it seems to be small.
If countries do stuff like this tho, it would actually undermine.
really hope to see other countires follow suit.