in the end, everything in the last 50 years is aimed to attract (transnational) capital to stay in one place or another, to allow financial speculation and yield earnings for a few ones in such place(s).
Borders mean nothing to capital and politicians know it. E.g. Starmer and anyone in his current seat knows that UK main business is financial speculation, so if they tax or push too hard, they lose a lot. Even the FA cannot sanction mancity afraid of losing money