Well I can tell you that it was a lot easier and cheaper to bring in my Filipina wife and her children when there were much stricter immigration controls and the Tories were in power.

£40 per visa, no other 'tests', letter from employer and letter from landlord if renting. 1 year 'probation' before full leave to remain granted.

And yes, I was a Tory voter and anti-immigration/EU.