There is an old canard, "those who can...do, those who can't...teach". In that manner, the NY Times may be correct. Since the liberals "can't do" they "teach".
ReallyGone:
You hit the nail on the head. Conservatives tend to have real jobs in the "dreaded private sector" (as talk show host Howie Carr here in MA likes to refer to it).
Liberals on the other hand tend to seek out sinecures in the foundations and academic worlds.
Bill
The simple fact is that fewer conservatives try to get PhDs than liberals. We abandoned that battlefield years ago and are now paying the price. If we want it back, we have to fight for it by getting those advanced degrees. Fortunately the number of Conservatives in the grad schools is increasing. We must continue if we want a voice in academia.