I disagree, software scales much better than, say, designing a bridge.

The idea that doctors need to make huge amounts of money compared to almost everyone else is very American. Here in Poland, doctors up until very recently were paid not much more than the country's average wage. Now it's more diversified, especially with short-term contract positions paying much more than that - but regular jobs at a hospital still don't pay more than 3x the national average.

I work remotely in the Midwest. I'm paid well, but I'm definitely not too far off from my physical engineering peers.