Medicare features an unusually complex financing design. The Hospital Insur
ance Trust Fund pays for Part A of Medicare (hospital stays), while the Sup
plementary Medical Insurance Trust Fund finances Part B (doctor visits, out
patient care. and certain home health services). At a time when Medicare po
licy is generating debate, this article takes a new analytical look at the
origins and consequences of the program's peculiar bifurcated structure. Ad
dressing historians of the U.S. welfare state as well as contemporary healt
h policy reformers, the article focuses on the crucial role of legendary Wa
ys and Means Committee chair Wilbur Mills in Medicare's enactment in 1965.
The central theme of the article is that fiscal conservatism and a commitme
nt to budgetary restraint constitute important elements of Medicare's origi
nal political understanding. Contrary to analysts who argue that Medicare's
financing design has produced "perverse" effects, we argue that it has ser
ved a valuable social function by encouraging policy makers to confront per
iodically the costs of one of the largest and fastest-growing federal progr
ams. An argument can be made that Medicare's original division requires mod
ification in order to integrate health care delivery changes of the past fe
w decades. It is crucial, however, for reformers not to lose sight of the p
olicy goals, including fiscal rectitude, that motivated the adoption of Med
icare's bifurcated structure in the first place.