There has been almost no increase in median household income since 1970s.
- http://web.stanford.edu/class/polisci120a/immigration/Median...
- http://web.stanford.edu/class/polisci120a/immigration/Median...
Accounting for inflation is not scientific. Its a social science. A median household can afford more of and better quality things today than the past, but some measures of inflation will not account for this correctly.