Why do people say Joyce Meyer is a false teacher(prophet) & uses the bib le to make her 60 million a week?

Televangelists are all conmen. Why do they milk their followers of such huge sums? If they're truly good christians who follow the bible, why don't they keep just enough money to live on, pay their staff, etc and give the rest to charity. After all, there's a saying about a rich man entering "heaven".