Should respondents on HubPages charge for their answers?
How much did Jesus charge for that Sermon on the Mount gig? ;)
If you have something to say - something which empowers people, helps them stand on their own two feet, teaches them to think critically, makes them develop their human potential, gives them strength without being burdened with an irrational sense of guilt - then sharing that kind of gospel is its own reward.
Can you make a living off that?
Perhaps. If people truly appreciate what you do for them, earthly sustenance will be the least of your problems.