The committee has changed since it awarded Friedman. This is like saying college campuses aren't subject to liberal ideation from professors because a zillion years ago there were many conservative professors. It wasn't as politically motivated in 1976 as it is today. It isn't that hard to figure out when AlGore wins because of a bad powerpoint presentation...
It's silly to pretend that the body is the same now as it was in 1976.
Apparently, you don't realize that the Prize in Economics and the Peace Prize are awarded by two separate and distinct bodies.
Do have anything to base your opinion that the Prize in Economics is awarded based on political ideology other than the fact that a different body awarded a different award to a liberal person in the recent past?