alt Hacker NewsLobbying is the right to petition the government. What you need is a countervailing powers to limit regulatory failure of institutional capture.
Just like the original post, make a definition that mistakes a pathology of the system for its core function (also: structural inequality is not corruption).
If you are a purist and eliminate all resource-backed influence by banning pooling money, hiring researchers, and organizing campaigns to influence lawmakers because "others lack those resources," you effectively ban organized labour unions, consumer watchdogs, civil liberties organizations. A well-organized national labor union has more leverage than a non-unionized gig worker in the EU. Asymmetry an inequity issue, not corruption. Well organized will trump over those who are not.
Corporations should be able to lobby, but they their lobbying should be limited more heavily.
The real big problem with corporate lobbying is that corporations do not work in the self interests of the people they employ, but the political power they wield is a function of the number of people they employ.
I think that it's very common for people to work for corporations that are actively working to undermine their workers rights, and using the political clout that their workers grant to do i
Edit: Unions do this too of course. That's probably the number one accusation that people level against unions to discredit the whole idea of unionizing labour. The union management will eventually work for their own self interest instead of for the union members
Turtles all the way down