There are other reasons to lie besides being funded by billionaires. Another common one is "to get elected by making false promises that people want to hear."
Q: How often do politicians tell lies to get elected, then go back on their promises? A: Every time they are funded by billionaires. For the first time in history, we have a candidate that is exlusively funded by ordinary people, so has no reason to lie! Please don't screw this up, we might not get another chance.