Many programmers hit their peak salary very fast. Making $140k a year for 35-40 hours of work a week <4 years out of college with no graduate school is pretty insane.
Continuing to make that $140k 20 years later is also insane, but in the opposite direction, but that's not the situation the post was describing. As a programmer you're fantastically highly paid at the beginning of your career but often not at the middle and end.