the only "rule" is you and your loved ones first, everything else is just someone trying to con you into being a benefit to them, never do anything altruistic that's being idiotic if you don't gain value from it the action is pointless, all you have to do is find more people like you and do everything within the legal frame of the country to get ahead, if you can avoid taxes legally by all means not your problem how the country is funded if you can get away with it you should do it