It is not possible to prevent the meetings and the conversations, but it is possible to legalize unannounced recording of conversations with any legislator or bureaucrat and the public release of same. This would serve to limit the damage of such dealings by, in effect, potentially making all conversations "on the record". This would provide a significant incentive for people to develop means of bargaining and negotiating that could withstand public scrutiny.  

"It is not necessary to have hope in order to persevere."