The notion of a defined 'core package of essential health care service
s' has appeared in many different health reform proposals in the 1990s
. This paper attempts to explore the possible objectives of the 'core
package' component of health care reform. Two broad applications are a
pparent: the use of essential packages to ration scarce public funds a
nd the incorporation of a minimum benefit package,into 'managed compet
ition' type reforms, where they constitute a mandated minimum lever of
private insurance cover. Eight possible objectives for an essential b
enefit package are described: To protect against catastrophic illness
events; to ensure social risk pooling; to improve allocative efficienc
y in the health system; to eliminate 'high burden of disease' conditio
ns; to improve equity of access to services; to combat cost-escalation
; to encourage competition between insurers; and to facilitate public
participation and transparency in decision making. Closer examination
of objectives reveals that they often conflict, which suggests that a
clear understanding of the purpose of reform is essential before it is
worthwhile devoting energy to the development of essential benefit pa
ckages. It is argued that two main clusters of objectives emerge from
the eight described, representing Rawlsian (risk avoidance) and utilit
arian (efficiency improvement) social welfare philosophies, respective
ly. Practical experience suggests that priority setting exercises have
been unsuccessful in meeting efficiency objectives, but that they may
well be quite useful in fulfilling risk-pooling aims. (C) 1998 Elsevi
er Science Ireland Ltd. All rights reserved.