Maybe they'd be less motivated to lie if they were strictly term-limited.
Terry, 230RN
"I'd rather be governed by the first 2000 people in the Boston phone book than the 2000 people who make up the faculty of Harvard."
--William F. Buckley Jr. There are many variations on this concept which Mr. Buckley used.

Why would that make them not lie? That'd just reduce them to lying for one term to get in and get paid selling us out. If anything it would make it easier for them to lie to us since it would be a new face every term. Candidate nomination is what needs overhauled so the paid liars can't be selectively sent in by their owners; take away their ability to buy nominations.
I propose a draft style: a few people are drafted from every county, after actual (not show/staged) public interviews and debates the county votes for their nominee to send up to the state, and so on. You'll get fifty candidates that the nation as a whole then can pair down to 10, and then 2, and then choose your president. The point of this whole arrangement is to take away candidate nomination/selection/gerrymandering by big money and entrenched interests.