Because they see other people gaming the system or somehow otherwise being protected from the consequences of their actions. Ethan Couch, who drove drunk underage and killed four people and fled the scene, and who got probation. Brock Turner who raped an unconscious woman, and who got stuff months in county jail and was released after three months. Matthew Broderick, who drove into the wrong lane, hit a car head-on, killed two people, and was fined a hundred pounds. Hundreds of cases, some high-profile, some only known to the local community, where people get off - sometimes on technicalities, sometimes on connections, sometimes on good lawyering, sometimes on bribes.
Then people wonder why they can't get away with things. Millionaires and billionaires get their debts written off, so they should be able to do so as well. They should be able to claim that they're not subject to laws just like those other people. So they start looking for things that might exempt them, patterns of how to get away with things. Every time something goes wrong, it's not because they're poor or unconnected, it must be because that other guy's lawyer wrapped his case in a red ribbon, or capitalized the defendant's name, or something else esoteric that they didn't notice or didn't think of.
And they talk to each other, sharing their theories of his to get away with things. And there's also a rich ecosystem of fraudsters and conmen who are absolutely willing to take advantage of them, selling them false license plates and fake "passports", selling handbooks and online courses on how to get away with stuff. If they're caught (and haven't just changed over to some other URL), it's because the law changed or there was some nuance in their situation, and you just need this other thing that'll fix it, it's only $129.99, payable in four easy installments ....