When a person have low Infiliration, he is less effecftive at promoting either Conservatism or Liberalism. So, if he promotes Conservatives at low Infliration, he'll damage the issues less than if he promote Liberalism at High Infliration.
The infliration system does help to explain why Sleepers are, in fact, Sleepers, and not regular LCS members who don't have to commit crimes. They are
not supposed to totally support your cause 100% of time publically, they have to have some sort of Cover ID, and Spouting Conservativism is a simulation of that.
That's still 3 steps forward, 2 steps back. Regardless, it would make the whole sleeper process very micro manage intensive, and very irritating if you want to optimise your sleeper effectiveness. Having to tell every single sleeper to switch from conservatism to liberalism and back again on the 1st of every month would be IRRITATING.
Also, that does not simulate reality very well. There's a famous Radio Personality, January-April, he is spouting conservatism (until his effectiveness hits 100%). May, he turns arch-liberal on the air. June, he goes conservative again. July, he tells everyone how liberalism is utopia. August, Liberalism is EVIL.
Er... no. Everyone would just think he'd gone mad and stop listening to him or something.
So, no, I don't think that this "liberalism lowers infiltration", "conservatism raises it again" is a good idea. It's only makes sense if you use "infiltration starts low", "conservatism raises infiltration", "liberalism does not drop infiltration". Then what you do is you have someone sneak in, he slowly slowly inserts himself into a trusted position by false loyalty, then once in position he STRIKES. That's what a realy sleeper should be like, not a wishy washy flip flops and stuff...