I mean it sounds like the game is attracting the type of people who would be attracted to the title, and then sticking around for the challenge. I don't think that's a problem you really need to invest in solving. Eve online has a similar problem with the ability to rob entire months of work with betrayal. Any game where lying can lead to a positive outcome is generally going to encourage a mindset. If your players like the game then it's the niche that you're serving, doesn't seem to be anying wrong with that, they're having fun. My question to you would be are you enjoying running the game and building it, you're there now important person in this.