The ultimate basis of my morality is the idea that maximizing overall human pleasure and minimizing discomfort is good, and the opposite is bad. I don't think this has an objective basis. It appears self-evident to me, and as best I can tell most people agree, but I won't pretend it's any sort of law of the universe.
Once you have that basis, game theory lets you extrapolate. Theft is bad it most cases, for example, because it lowers the overall human good, even if it improves my own particular good.
Governments are useful because they're a way to overcome collective action problems like free riders or tragedies of the commons. Because of this, they can be a force for good.
I have no idea where you got this "turn in police some people, but not your friends and family" from. Please try to limit your commentary to things I have actually said, not things you have imagined.
