For me this is a totally different problem to whether leaving the EU is a good or bad thing.
Where you have people who are poor, or aren't doing too well - they seem to have a tendency to blame the government for everything, and as such - it's entirely predictable that poor/less well off/poverty stricken people, will vote against the government on any issue.
Most of my friends are in the north east (Middlesborough) and it's the same there, most people are voting leave simply because they're upset that they have nothing, and the government are an easy target to hit - when they allow an open referendum like this.
It may actually be true - that the end result of government policy has in fact left them poorer and less well off, but I don't believe these facts are ever really considered, and as normal - people don't make any sensible determination to the matter at hand which is, "should we be in the EU or not" and instead go "******* government ***** voting out waaaaa" without much else.