I'm not in the category you have identified as "the rich", and in fact fall pretty squarely into the middle class category, here in California. My net pay increased after Trump's tax cuts for "the rich" and also my company gave us all bonuses (minimum $500 per employee) since they apparently had some 'throwing around' money, due to Uncle Trump.
Sure, that's anecdotal, but I think it pretty much shoots down your theory (and that's being generous, to describe what you wrote as a theory, because it's nothing more than fancied-up orangemanbad rhetoric, imo) about the tax cuts being only for "the rich."