Public lying has turned out well for Elon Musk. It is really up to the rest of us to make public lying turn out less well.
If most of us regularly lie at work or with our partners, we get sacked.
Unless Elon is some kind of special new liar?
More usually, the biggest liars are more vague about what and when to expect any supposed benefit if you back them. Thus, "keep out illegals", "trickle-down prosperity", "keep brown-skinned people away". How these would be benefits, if delivered, is carefully not explained.