Across the world, healthcare providers must wrestle with the twin ogres of finite resources and infinite demand. Successful healthcare delivery creates its own legacy of need. For example, a renal failure patient may now be given a greatly extended life by means of dialysis or organ transplantation. In the process, the healthcare provider has created a permanent demand for services during that extended life. It has been estimated that the recurrent cost of maintaining a patient on hemodialysis for 1 year in the United Kingdom is in the region of £20,000.