I've had a different array of answers as to why people voted leave, which mostly boil down to the people becomming disenfranchised with the EU thanks to our own MEPs. AKA: They can no longer see the point of the EU. Some also feared being swamped by migrants thanks to the current crisis rather than the regular migrants and immigrants. Some do feel that the large numbers trying to get here through Greece do include radicals.
"I have not seen a single European on long term benefits (there is a legend that they exist)"
Oh, they exist. The ones I know to are former Kosovan refugees* who decided to stay. There aren't many, but they were responsible for a lot of bad feelings towards refugees in the area after they refused to go back to Kosova and were being blamed for an increase in crime in the area. Most were on benefits, and some still are (I could even give the addresses of some - they're well known in the community). They are still associated with the illegal work gangs known to operate in parts of the Midlands, although these are slowly being shut down.
* We had a large community of refugees given shelter around where I live. Most were fine, some even great, but there are always a few who had to go spoil everything. Not even 1%, but those are the ones people remember and taint the very idea of giving shelter to those who need it.
"I have yet to see a Brit that would like to wash cars in the freezing cold in the Sainsbury's parking lot"
Maybe not if it's freezing, but I've seen charity car washes take place when it's cold, even when it's raining. Not quite what you're meaning, I know, but I doubt Sainsburies would allow a private firm to offer car washing on their car parks as most have their own car wash attached to the petrol station, so the opportunity is rather restricted.
" ...or collect potatoes in Lankashire or catch chickens in Norfolk while being subjected to outsourced (to a similarly imported Eastern European henchman) abuse by the gangmaster."
Which is illegal, and while I don't know about Norfolk or Lancs, there have been gangs operating in the Midlands that import 'cheap' (aka slave) labour from Eastern Europe*. I really don't see why you'd want someone to work like that, if that was what you were suggesting (am hoping it's just ambiguity in how you phrased it).
* Not only reported in local news, but I've had police call around to check gardens after a crash when illegal immigrant workers fled an RTA at 2am (the van they were in crashed into a lamp post when a worn tire blew). The workers were hiding from the work boss as much as from the police. Near a dozen were found in the end - not all of them - and raids of houses followed that were identifed as locations other such workers were being kept. Was a few years back, true, and a lot has been done to crack down on such operations, but with so many fruit farms relying on cheap migrant labour, it's possible it still happens.
" If you know of such legendary person, a lot of us would like to see him. He is the stuff of a legend."
Am really not sure this is true: Someone forced to work under an abusive gangmaster is a victim, not a legend. I wouldn't exect to see anyone - Brit or not - wanting to work under such conditions.