Lobbying today only really works because power is very concentrated. If you get access to Tony and can sell him on your plans (possibly with the help of a loan or two) you're in. Similarly K Street in Washington. It's all in one place, and the players all know each other. That's what makes it so potent.

When you have a few hundred randomly aligned people to persuade, it becomes a more complicated thing to arrange.

It surely isn't possible to arrange a perfect system. But as someone else pointed out in a different thread, democracy is based on keeping economic, religious, legislative, presidential and popular power separate. Once they start amalgamating democracy is dead. So any approach that helps maintain the separation, which means maintaining checks and balances, is an improvement on what we have now.