If incomes vary, and we insist that medical care be acquired through the
market, then the amount and quality of care must vary with income. Thus
our classification of needs and wants bears on social policy, which will apply
differently, depending on whether it concerns, or is thought to concern,
needs or wants. The more we think in the language of want, the more we are
likely to be satisfied by the idea that the free market should govern whether
and how well we will be satisfied.