Forgive me Bubblyrat, but how do you distinguish every "drug-dealer, murderer, gun-runner, money-launderer, people-trafficker and racketeer" from other foreigners, or indeed the home-grown undesirables?

Immigration control we need, probably, but we need a rational policy.

I'm inclined however to think that those here without an absolute right of residence might merit deportation after serious offences, and the apparently wealthy without visible means of support might deserve a bit of investigation....