If people start going to doctors before they get sick, we
a) save a huge amount of money
b) create an incentive to advance preventive, low-cost medicine
c) get a better understanding of how medical conditions evolve within the community
All three are worthy goals (and b may even spur a very profitable industry)
Early treatment and disease screening is not a panacea. Sometimes it makes sense, sometimes it's more harmful than doing nothing.
Quantitative cost/benefit analysis or GTFO.
So this is probably part of a world where all KINDS of conditions are detected and corrected early. Take, I dunno, one day out of every quarter, get some blood drawn, a few scrapings taken, and have a zillion tests run on it. Then spend the next quarter feeling pretty secure that You Are In Good Health. Or that You Have Something Wrong But It Is Being Handled. Less stuff to worry about - better quality of life. Which, if you only look at things in terms of the ALMIGHTY DOLLAR and WORKER PRODUCTIVITY, also means happier workers who have one less thing distracting them.
As opposed to the current state of things in America, where any and all interactions with the medical world are to be feared because costs are insanely high, and insurance companies fight like crazy to avoid any and all payouts.
I hate to get political with this, but really, I think any attempt to think about the cost/benefit situation of something like this is going to pretty quickly lead into considering the overall state of health-care.
In that case, we are positing a world in which thousands of people are receiving false positives, suffering side effects from unnecessary treatments, and dying of infections they received while their non-cancerous mri blip was biopsied.
Even in a world where MRIs and HIV tests are free, full body scans and HIV tests for everyone would be a dumb idea.
Red meat in a high glycemic index and/or calorifically high diet is bad for you.
There are probably leaner sources of protein you could go for, but the fats in quality red meat are the closest thing to a nutritional panacea for humans.
Admittedly, these boons mean little when all of your health problems are from eating too much or eating junk food (candy, soda, etc).