Our neighbors "across the pond" are getting concerned about inequality, too. Check out this article from the Guardian.
It also makes the point that inequality might affect housing prices.
So here are reasons why it does matter. For a start, house prices have gone mad, partly because too much money is chasing too little property, not just in Mayfair but in places like Doncaster, where City tycoons are buying up whole buy-to-let streets.