The underlying trends that the OP calls out are there, but I do not agree with the implication that it is a planned conspiracy. Extrapolate US demographic trends about 30 years and the USA will look like Brazil. Vast underclasses of uneducated poor, a small middle class that manages things, and a ruling elite that stays in power through generations, with the occasional “union” candidate who “shakes things up” before being co-opted into the system. When politics is about many different groups competing for a bigger slice of the pie rather than governing the nation that is what will happen (clientelismo is what its called in Latin America). The only way to stop it is to discontinue the Federal Government’s role as a redistributor of wealth – end transfer payments.
