The unions got drunk with power and thought they had the right to tell their members what to do, tell the elected Govt. what to do, and generally run the country.
I speak as a former TGWU shop steward / safety rep and former Socialist.
The point about the guys undercutting British workers is a very relevant one. They rent out garden sheds & garages in London to live to keep their overheads down. They live like that for a while to get themselves established, but once that happens, they will want the same wages, rights, legal protection etc. that the guys had who they undercut in the first place.
But as someone said, its really about numbers. Whatever your viewpoint, we are now at saturation point, especially in the southeast.
Roads, schools, hospitals, doctors surgeries etc. etc are all at bursting point, which is ruiniong the quality of life of the people already living here.
The greater EU question however, isn't really anything to do with any of this. A country which cannot make its own laws and pays taxes to foreign powers is no longer a country. That's what I want to change.