That's an interesting question.
First of all, lobbying, as defined in the Lobbying Act, is considered a legitimate activity. Influence peddling is a different story. If you're a former designated public office holder, you're not allowed to lobby for five years, so with the scenario you have given me, I'm not sure where we'd draw the line with respect to the facts, either.
I can only apply the law as it is written, and it recognizes that lobbying is a legitimate activity. In fact, I appreciate your opinion, but I have also met a number of public office holders who don't share your opinion and who actually believe that lobbying is a legitimate activity, and professionals in government relations actually provide them with information they need to make the decisions that are in the public interest.