I don't know of any other country in the world which allows unconditional settlement arrangements to 450m people from other nations.
Here’s a list of 27:-
Austria, Belgium, Bulgaria, Croatia, Republic of Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain and Sweden
Indeed Hymie. I should have added "outside the EU". I thought, in the context of this discussion that was obvious. Plainly it wasn't so apologies for putting you to all that trouble. To add a little context, there are roughly 180 sovereign nations in the world containing around 7bn people (give or take a little of each). 153 (85%) of those nations containing 6.5bn (over 90%) of those people see fit not to allow such unfettered movement. Only the EU does. I wonder which group is the most sensible?
//If voters had researched it, it's most unlikely Leave would have won.
They wouldn't win now.//
But they didn't, we've left and you don't know what the result of a similar vote would be now any more than I do (and it's irrelevant anyway).