Take a look at ANY - not counting, of course, the Cato Institute or the American Enterprise Institute - real, neutral economic analysis and it show unequivocally that the disparity in wealth towards the wealthy has gone hand-in-glove with typical 'supply side' measures such as tax cuts for the wealthy. This is not opinion; it is fact. Similarly, all trend lines of middle class spending power has also slid proportionally to supply side actions. Again, pure fact. You need to remember that the supply side argument is that the 'savings' will go back into the economy creating more 'wealth' when, in fact, these savings went into private investments and the so-called FIRE industries (finance, real estate) that benefit ONLY the already rich.