Honestly, adding extra jail time would not motivate the Law Enforcement. The police side has been recently like, pretty dead. Also a major part is that I barely see any police officers respond to SRs nowadays, if so, they most likely just snipe and get killed eventually. What could be boosting is maybe make the SAPD bigger and serve a bigger purpose rather than just for the PC spawn, maybe a special unit or something that can be earned after you have perhaps done some tactical operations (RP wise), tests, and in general prove that you are worthy.