He's probably paying out of pocket so it won't affect your health insurance rates.
That's not how macroeconomics works.
An economist here. This has nothing to do with "macroeconomics" and, yes, paying for a drug out of pocket does not have much to do with insurance premiums
While I agree that this should not impact active people like ourselves as much because we can workout to address the muscle loss, it is much harder for those over 60 because its also well documented that it is very hard after your 50's to put on additional muscle mass for a number of reasons.
This might truly be "stating the obvious", but assuming you aren't running competitively anymore, there's a miracle drug for that too...
I tried low dose Retuditride on a whim to drop the last few pounds I wanted to lose (5'9" 145, and I wanted to be 135). It certainly worked well for losing the weight, but I would NEVER do it again! My resting HR went up 15bpm and I felt horrible all the time. My running became a torture. It took 8 weeks to get back to "normal", but my new normal was way slower than before. I looked fit and lean at 135, but I was anything but fit. I'm at 140 now 12 weeks after taking it, and my running is nearly back to where it was when I started. Perhaps I am an outlier with my bad reaction, but I really regretted trying it. I would far prefer to be hungry than to feel so rotten that I couldn't eat.