Lobbying is cause promoting. You look for invested parties and plead your side. It’s fundamental to running society where groups want representation. I think you’re mixing lobbying with bribery. Bribery is illegal.
Groups which don't have a lot of people in them, but do have a lot of money, and can't find anyone willing to voluntarily advocate for them.
Bribery ought to be illegal, but in practice it's legal - e.g. corporate donations.
Counterpoint: savvy populist candidates can get traction without spending nearly as much money as their well-lobbied counterparts.
True. Also if the money enriches the candidate thru means other than cash-in-hand, the bribery may be legal and is just as unethical.