Lobbyists, for the most part, wield power not because of the money they give to politicians, but because of the votes that they implicitly command from the constituents on behalf of whom they are operating. They also command considerable power because they have research organizations that are better funded than congressional staff allocations for doing things like authoring bills.
Way more fishy is the revolving door when politicians leave office; that is done openly and without shame. Somewhat fishy are implicit bribes (like buying 1000s of copies of a politician's book), and sometimes preferential terms on loans, or employing family members (or buying their art for ridiculous prices).
But lobbyists and vendors are already very tightly locked down -- the things you are talking about simply do not exist; politicians and special interest groups have found better ways of buying votes.
Maybe we should force all meetings with politicians to take place on the floor of a mcdonalds. No chairs - that would be too fancy.
What are you trying to achieve with your sarcasm?
If you have a job you can probably have a look at your ethics or anti corruption guidelines for a good idea of what is appropriate.