Because the people making laws benefit from it. It’s the people that are hurt. It’s also not clear what would happen if you somehow were able to make all campa

Because the people making laws benefit from it. It’s the people that are hurt. It’s also not clear what would happen if you somehow were able to make all campaign spending derived from public funds and make lobbying illegal. It would likely just increase direct corruption, but perhaps it would be less than you see now. On the other hand, while only available to the wealthy, lobbying allows for a kind of direct democracy.