Say what you want, but judging from the interview I put a link to, it's obvious Tim doesn't do it for the money. Paul did a panel at Dragon Con about fart jokes and boy humor, so he must have liked working on the show too. Paul's not with the show anymore though....or they just swallow their pride like other Disney Channel employees and do it for the money.
I'm sure the two, who are good puppeteers, are glad to be performing on TV regularly, but I have a theory that no one on a Disney sitcom is proud of what they do. I can't imagine any of the ANT Farm writers turning in a script and saying "Now, THIS is what I'll be remembered for!"
Does anyone hope they do a musical episode? Tim is a great singer. Listen to him sing in these two clips:and.