Did you not hear about the Russian tanks that fell apart on their way to Ukraine because Russian soldiers had been looting parts of them to sell for vodka?

Most treason isn't called out with a big neon sign and a confirm dialog reminding the actor that they're committing treason. From the inside, most treason just feels like workplace fraud/embezzlement, or like laziness, or like "office politicking" where your office happens to be "the state legislature." It's almost always just petty crime, that happens to have big consequences.

People are so much more venal than we give them credit for.