I do agree that it makes no logical sense to couple medical insurance to employment. This system was created sort of accidentally as a side effect of wartime tax law and has persisted mainly due to inertia.
That’s to say nothing of the fact that millions are uninsured in the US and have limited access to necessary medical treatment, never mind “cutting edge” treatments.
Source: https://fred.stlouisfed.org/graph/?g=1JxBn
Details: uses the "Wage and salary accruals per full-time-equivalent employee" time series, which is the broadest wage measure for FTE employees, and adjusts for inflation using the PCE price index, which is the most economically meaningful measure of "how much did prices change for consumers" (and is the inflation index that the Fed targets)
Source with details: https://fred.stlouisfed.org/graph/?g=1JxIa
Then calculate cumulative inflation as the proportional change in the price level, like this:
(P_final - P_initial) / P_initial = (125.880 - 37.124) / 37.124 = 2.39
This shows that the overall price level (the cumulative inflation embodied in the PCEPI) has increased by about 2.39 times over the period, which is 239%.
Overall, historical comparisons of inflation numbers are so imprecise to be practically worthless the longer the timescale. You can expect the real figure to be much greater in reality for consumers, given the political incentive to lie over inflation data.
3.389 - 1 (to account for increase) = 2.38 ~ 239%