Nearly every industrialized country on earth is a rich amalgam of immigrants and natural born inhabitants. However, I would suggest that in mature democracies, while immigration can be a valuable asset, it can also be a dangerous and destabilizing force when allowed to grow unfettered, or unnaturally. I would further suggest that in recent years immigration has been a vastly different proposition than in the past. Indeed, in my lifetime, the profile of immigration has changed dramatically.
Inequality may not necessarily be an EU problem. In fact, I'm not sure inequality is a problem at all. There has always been inequality and there always will be. The old parable of giving three children the same gift of money today will produce vastly different outcomes today is universal. That said, the levels of inequality are becoming more exaggerated and may themselves become destabilizing to a strong democracy. In America, we see this through the prism of Citizens United, which allows unlimited money to feed the political process.
National debt is not the issue, but the funneling of sovereign wealth OUT of the country to feed a machine that doesn't necessarily represent either the best use of that money or the reason it is given. If the EU is so liberal that it can never allow failure, then failure will be rewarded and accountability will be nonexistent.
That sounds like the proverbial rainy day. The above issues are ever present, and a banking crisis of the magnitude of 2008 should never be allowed to happen again (and I believe Dodd-Frank AIDS is greatly in the States), but I think the EU is heading for a day of reckoning regardless of Britan in the EU or not. Zero interest rates, slow and distinctly regional economic growth, and an anemic global business environment all point to pain ahead and I don't believe Brexit has a damned thing to do with it. So, to suggest we need to wait for a reversion to the mean also suggests that such a reversion creates a better time and future for a potential British exit. I don't think it does. I think the horror stories are just that...stories designed to frighten.
To be fair, I believe this issue will be dead and buried for a good long while if it doesn't pass now. And, to your point, as a country, I think we need to walk and chew gum at the same time. I don't see any serious countries following a single track focus, just as I don't see the Brexit vote as the sole issue on anyone's agenda. Britain will continue to operate regardless of the vote and I have certainly never suggested that either the house is on fire OR that the deluge is approaching. As is always the case, there is only so much oxygen to fan the flames of the headline issue du jour, but I don't believe this vote is either a panacea or a distractor from the dearth of success.
Thank you for the respectful discussion.