Voters commonly condemn politicians for being insincere, but politicians often must disguise their true feelings when they make public statements. If they expressed their honest views-about, say, their party's policies-then achieving politically necessary compromises would be much more difficult. Clearly, the very insincerity that people decry shows that our government is functioning well.
Some of the public statements made by politicians about their party's policies could in fact be sincere. This seriously undermines the reasoning.