I'm wondering if maybe there should still be a little room for infiltration to increase. I don't think it should work by "spouting conservatism." But possibly by "laying low" someone could slowly move their way from "supporter" to "informant." The idea is that by keeping their nose completely clean, they can change their career and move to a position w/ information. A hippie becomes an office worker, a negotiator becomes a SWAT team member, a veteran becomes a mercenary, etc. The higher the supporters heart is, the more distrusted they are, and the longer it takes for them to become an informant. A low heart supporter could infiltrate in months, a high heart supporter might take years.
So basically, this would be like laying low right now, except at full infiltration, your agent "level up" to a new career. But there would be a risk as well: while trying to become an informant, there is a chance that the supporter gets compromised by some force of conservatism. As a result, their "contact" (who ever they report to) will go to a meeting with them and get ambushed by a bunch of CCS vigilentes/gang units/enforcers/mercenaries.
And maybe there should be random opportunities to be promoted to "sleeper" status as well. But these should carry a price, the agent has to buy in with some conservative action. So a liberal judge at full infiltration (i.e., not actively supporting the LCS at all) might make a conservative ruling and become a high profile Conservative Judge. This gets you a powerful sleeper, but gives a big hit to one of the issues and hurts the judges juice (making them useless if they didn't have high juice before hand.)
Mostly just something to think about. Such a system isn't really needed right now, as powerful informants aren't that hard to get. But suppose there was a use for high juice sleepers. This system would let you have a wounded active LCS member without many high profile crimes become a supporter, then infiltrate society to become a powerful informant. While other sleepers carry a risk of compromise, this dedicated (high juice) liberal would never give up the LCS.