In both the NHS and Medicare, recent emphasis has been on contracts wi
th payment based only on the number of patients treated. It is shown t
hat, without direct monitoring of quality or effort to reduce costs, s
uch contracts are efficient only when it is efficient to treat all pat
ients wanting treatment. It may not be when treatment costs are insure
d or subsidised. Such contracts can then be improved by including paym
ents for the number of patients wanting treatment, as well as for the
number actually treated. Even then, the outcome will not generally be
efficient if quality is multi-dimensional.