Problem here is - it's hard to break lobbying away from freedom of speech. If a neighborhood gets together and decides they want to stop a prison from being put up next to them, that would technically be lobbying. Can't restrict the right of citizens to assemble and organize - that's right there in the constitution, and you definitely don't want to change that part.
Yes, money has gotten out of hand, and it's both major political parties that are indulging in that wellspring of cash. Look up how much money flooded the Clinton campaign in 2016, the bulk of which came from corporations and special interests. And, surprise, surprise, after the 2016 election, donations to the clinton foundation dropped to almost nothing. Almost as if those big donors were expecting something more than just a warm glow when they made those big donations.
Not defending Trump here - egad, what will he say next? Just pointing out that you need to do more than fear the alternative - you need to hold your own candidate to the same high standards. That did not happen, especially in the 2016 dem primaries.
If there is one bright spot in the 2016 election, it was proof that the lobbyists and big corporations can't buy the election. The dems outspent the repubs by at least 50%, the bulk of that from corporations and special interests. And they still lost, going up against an obnoxious boor with no political experience. There is a limit to what big money can do.
There are two ways the average person can fight off big money influence.
First... vote! Get your tail to the voting booth, not just for presidential elections, but for midterms as well. And not just main elections, primaries too. If more Sanders supporters had bothered to actually vote in the primaries... Lobby your friends to do the same (if you can't beat the lobbyists, join them). In the end, elections are decided by votes.
And second - make up your own mind before you vote. Big money means ads, both political, and commercial to favorable 'news sites', to encourage more favorable coverage. Be suspicious of what you read and see, ask yourself: what are they NOT telling me, and why? Stop looking for the quick answer, and start looking for strong character when you vote in the primaries, and in the main election.