But expenses expand to fill the available budget, so the actual cost of living is higher, as people earn more to spend more to get more.
(If you wish you had more free time but don't negotiate a pay cut in return for shorter work hours, it just means you value the money more than your time.)
Housing is the biggest culprit. It has gone up something like 5x in the last 20 years, while salaries have increased maybe 20%.
What people actually pay for it, though, in terms of mortgage payments as a share of income, is at basically the same level (6%) https://fred.stlouisfed.org/series/MDSP
As long as people buy houses on credit, high house prices only reflect that mortgages are cheap.