This line of argument is weak because in real dollars spending money to buy a politician is cheap. It's actually a very well leveraged dollar to contribute to a politician who can regulate your rival. Maybe if you brought in an analogy to nukes? Sure there's this great weapon out there called "regulation" but we don't want corps wielding it against each other, it's just too dangerous. If they must fight they should fight with conventional weapons in the consumer market. ... Not great but I think that's in line with what you're saying.