I assume a good part of this is due to increases in housing prices? With how much value property has gained I could imagine that a bunch of people that owned at least something suddenly have become millionaires on paper. However without this actually improving their standard of living.
Also without adjusting for general raises in wages and the stock/property market this absolute benchmark really doesn't mean much.
What matters more is how this wealth actually translates to increases in the standard of living. Not if pure numbers go up, but get cancelled out by inflation and increased costs.