I can think of quite a few refrains that I have heard or read from anti-Zionist camps saying that joining the (secular) Israeli government which has a hand in certain aveiros is prohibited due to various Torah problems, referred to as "Mesayei'a Ovrei Aveirah", "Machazik Yedei Ovrei Aveirah", "Al Tischaber Larasha", etc. (In short these mean not to associate and help people who violate the Torah.)
While some may believe that the secular government may not be "Ovrei Aveirah", there are many parties in Israel that participate in the "secular government", who probably believe that others who they work with are in fact "Resha'im". What is the traditional response to these questions? (Please link to essays, books, shiurim, etc. as sources.)
Do they simply say that the pros outweigh the cons, or do they have a reason why these concerns are invalid?