[yendu bwam]

Is there any known law that forbids coveting? I really doubt it (theft yes but not coveting). I think in our western societies we may covet as much as we want.

Yes, yes, yes. You can covet as much as you want. But the point is that support for laws supporting legally enforceable property rights grew out of general agreement that that commandment was a good idea. The law can't change peoples' thought. It can only get them to act in a way that presupposes that following that commandment is a good idea.

[BMCDA]

But then isn't the commandment "Thou shalt not steal" redundant. Or why do people steal if not for coveting something they cannot afford.
It's beyond me how one can forbid a state of mind especially one that's essential to our capitalistic economic system. BTW, did I mention greed? ;-D