The median family income in the US has gone from 10K in 1971 to 55K today, a gain of 5.5x

however,

The median cost of a car has gone from 4K to 48K, an increase of 12x.

The median cost of a house has gone from 25K to 357K, an increase of 14x.

The median cost of an ivy league college has gone from 3K a year to 87K, an increase of 29x.

The average cost of healthcare per person has gone from $400 to $15,000, and increase of 37x.

Basically, the average person in the US is worse off today than in 1971. So much for "progress"