If you think the median american had more disposable income in 1940 than today, you are hilariously uninformed.
https://fred.stlouisfed.org/series/DSPIC96 (only goes back to ~1960, and the I think this is mean, not median, but also a huge enough trend that it is impossible to deny).
https://fred.stlouisfed.org/series/DSPIC96 (only goes back to ~1960, and the I think this is mean, not median, but also a huge enough trend that it is impossible to deny).