If we could get people to lose weight, by a defined process, to make medical milestones, then heath insurance would plummet in cost. Similarly, if we could get verifiable blood testing showing compliance in taking routine medicines at a therapeutic level, then health care cost would dramatically decline.
Just as clean water was the most vital aspect of improving public heath, lack of exercise, sedentary behavior, being persistently overweight puts terrible stress on the structural integrity of the skeleton and heart. 75% of patients who are on routine medication do not take them in a manner to ensure therapeutic levels. So they have poor efficacy.
It really is very simple to fix, but very intrusive as it means being medically evaluated in a slightly different manner. If effect, you would be paid to stay healthy, versus universal coverage by detached unmotivated patients.
I believe the average number of prescriptions by retirees is five. Thus if five medicine are not taken in proper amounts, their heart medication, for example, is inadequate.
For mental illness and medications, the compliance is very poor. The same is true for medicines to treat infections.
The most expense is on the end of your life. The health costs in young adulthood are minor save pregnancy and accidents like broken bones.