According to census.gov http://blogs.census.gov/2013/03/21/household-wealth-and-debt... at least in the US "changes in overall median net worth observed over the past decade have been driven primarily by changes in one of its major components – equity that American households hold in their homes".

The recipe for greater wealth equality is to subsidize mortgages and restrict new construction, so that everybody's house values move up a notch, which makes everyone feel a little bit better about themselves.