... either you misunderstand - or you're being naive. There has to be strict control on who should be allowed entry to the UK in order to keep out the undersirables you mention. As I've already pointed out
in an earlier post, much of the action currently being taken by British Immigration Officials derives from bitter lessons learnt in the past - when a pattern emerged involving a significantly higher proportion of illegals from specific countries. And, in this respect - if no other - they're serving their purpose effectively within the framework of resources available to them. Indeed, it could even be argued that some of the measures aren't tough enough.