The 70s and 80s were an anomaly because of the Baby Boomers who were entering the workforce and peak buying years, and along with that, women were entering the workforce en masse. IMHO, those two trends alone were largely responsible for the inflation of the 70s and 80s.
I just don’t see any reason for incomes to go up unless the govt modifies our tax and trade policies. With corporate America’s strong grip on our govt, I just don’t see that happening (though I wish it would!).