Old people aside, I think though that the likely case is the following (from my own experience with doctors, hospitals and potentially life threatening illnesses), is that there is a negative feedback loop in effect. Doctors do not take the safest routes first, far from it they always go straight to the big guns before trying out safer procedures. For example, they will opt for a CAT scan over a MRI almost every time, however a CAT scan gives out huge doses of radiation and is very dangerous as it can cause cancer and such. MRIs on the other hand are entirely safe. So, in effect, I think that this, in combination with improper long-term testing of drugs, is the cause of our health woes. Improper long term testing of drugs causes problems which in turn they use drugs of which those effects cause problems later on which when those take affect etc..... The chances of avoiding any serious illness this month is good, but over your entire lifetime is bad. Therefore everybody will eventually enter the cycle of poorly thought out medication policies and poorly tested long term effects of drugs entering the medical system.
The other possibility which I think is a contributing factor, is that we are treating more illnesses which are just minor inconveniences now than we did before. AKA People don't like being uncomfortable. This still falls under the "there are more sick people" umbrella. Perhaps its a combination of the two which are the cause of our current predicament.
If I didn't miss anything (and I likely missed something), who is to blame for this?
I blame capitalism. But before you go and tweet about this, lets think about this for a second together. For one, I am not against capitalism. Some companies should definitely be for-profit and some should be not-for-profit companies. Any company which deals with the health of the general public should be non-profit. Their sole concern should be the safety of their products and the usefulness of their products. Quite frankly a for-profit drug company encourages this negative feedback effect as it makes them more money. A for-profit drug company for example doesn't really care about curing diseases as there is far more money in just cleaning up the negative affects and forcefully addicting the people on their drugs.
Opinions? Please comment, I'd like to hear it.