That's an odd way to describe the most accessible era of global travel in human history. It's not like first class tickets, which provide a comparable experience at a comparable inflated-adjusted price, aren't available to bring back the 60s.
There are more travelers who want a cheaper ticket than there are those who want, more than cheaper tickets, (a) more comfort or (b) faster travel. Evidence for this is in the demand for cheap tickets with long layovers and repeat flyers in basic economy.