It's a pretty common scam already. "Sign this to receive airdrop". Haha, you just signed away all the money in your wallet. People are already losing lots of money this way and they're the ones who at least understood the concept a little bit.

US govt creates a list of companies eligible to receive social welfare money, and the smart contract money will only be exchanged with those companies. They can remove companies from the list at will, on a whim. They could also do this with all money if it’s something like FedCoin. They could do all kinds of interesting, dystopian things. I bet there’s a black mirror episode somewhere like this.