“By 2040, at least 40% of Americans making to age 65 will live to age 100.”

Demographic trends pointing in that direction; declining mortality rates from diseases that used to kill us; better medical technology, treatments, and prevention; more personal responsibility for health; faster detection of health problems and earlier treatment; even more money going to medical research on 'popular' problems such as Alzheimer's, cancer, heart disease, stroke; it costs Medicare less to keep us alive and healthy than it does to pay for medical procedures.