It’s simple math in which every elector voted for their state’s popular vote winner (and that’s if you discount Bush v. Gore, which I’m assume you’re doing here, otherwise we’d be debating an issue that has no relation to the electoral college at all); all the votes for the losing candidate statewide are discounted. Never has an elector been “paid off” to vote against their state’s popular vote.
I don’t think you know that electors have a public ballot and people know when tallies don’t match up with statewide popular vote counts. You should read up on https://en.wikipedia.org/wiki/National_Popular_Vote_Interstate_Compact#Motivation, especially the linked https://en.wikipedia.org/wiki/United_States_Electoral_College#Difference_with_popular_vote which has a helpful graphic.