These are facts. Facts denied on the right-wing of politics, of course, but facts nonetheless. All I am describing is the lower marginal propensity to consume amongst those well off compared to those on lower incomes. That this is a fact is obvious: the wealthy must consume less as a proportion of income or they would not be wealthy. And we do need to address that inequality as a result.
Nope. A trustafarian can – many do – spend 110% of their income. They do become less rich as a result but it’s not, therefore, true that the rich must, by merit of being rich, have a lower marginal propensity to consume.