It's called "acting."
It's about money.
And who's to say that government Jack Bauer works for isn't socialist itself.
We do have a lot of preachers that pretend to believe the Bible, and fool their congregation into thinking he is what he is not - so, I suppose it is possible for actors/actresses to do the same.
How many of us would believe that the funny, in fact, zany redhead of the 1960’s with her neighbors the Mertzes was in fact a card-carrying communist.
I suppose being married to a Cuban should have been a big clue.