The cold-hearted Maoist replies, “Dream on, by that point what’s left of them shall still be white-collar fascists defending a starving fortress Amerika and firing bullets at Third World Maoist armies, while eating old Spam and lining up to perish for the ‘right’ of their toxic-mutated children to ‘live free or die!’”

The formerly high-paid worker or small business owner will certainly become reactionary, and in fact I think they already have.

What of the children of those bourgeoisified white workers who came into adulthood and found out they can't afford education, can't afford property, can barely afford rent, and have to live paycheck to paycheck paying off debts their parents never had?

I don't think they're responding to debourgeoisification the way their parents are, and that makes all the difference.