[whimsicalism]

It is common, but I would not go so far as to say "par for the course". Nor does the SEC get "tons of press and scrutiny" - indeed, you can see all of the positive op-eds written in places like the NYT and WaPo about Mary Jo White's appointment (with a few notable dissenters in Salon like Matt Taibi).

In the EPA, for instance, this was Obama's appointee: https://en.wikipedia.org/wiki/Gina_McCarthy. No significant industry ties. Here's another one of Obama's picks for FDA: https://en.wikipedia.org/wiki/Margaret_Hamburg . Again, no significant industry ties.