To be fair, Hillary Clinton was also a liar and a grifter but she did kind of get punished and publicly humiliated for many of her lies.
Generally speaking if someone behaves badly in public and is not punished, it creates a great incentive for millions of others to do the same thing. Some people are moral by nature and will behave morally even if evil and amorality is all around them. Those are the heroes and saints. The people that will help slaves escape in slave societies the ones that will help safe victim populations when their own government is openly encouraging genocide. These people are great, but very few.
There are also the almost criminals, people that are always thinking in the backs of their minds of doing something awful, and it is only the possibility of punishment that is keeping them. Well when someone engages in bad behavior openly and publicly, and is not punished, even rewarded, those people will rush into bad behavior themselves.
So there you have it.
P.S.: To be fair Elon Musk deserves honorable mention for openly and publicly engaging in amoral behavior and getting away with it.
Citation needed