I don't think it should work like law enforcement or even reputation. I think that it should work like karma in the spiritual sense of how karma works. I think that Karma should effect Luck +/-30pts. If you steal a lot and kill indiscriminantly then your 80 Luck stat works more like a 60 or a 50 and if your good and goodness can be things like giving beggars a coin and following the rules of the guilds you are in or doing a pilgrimage, etc then that could turn that 80 Luck into a 110 in practice even though you may not see it in the stat.