True, but 'do not covet thy neighbor's goods' is also one of the oldest traditions we have. There's a reason such moral imperatives have developed in our culture; they are more often than not destructive.
I think the problem here is that people with a single loaf are looking around and seeing some guy with 1000 loaves of bread on the news saying that the fact that he has to pay 10 loaves to the government is immoral and that poor people would be fine with half a loaf.
Tax cuts and the cuts in government programs that come with them directly affect those with the least. Telling people not to covet and not actually addressing inequality is how you get things like the French Revolution.
You won't find an argument with me that the tax system should be fairer, or at least have fewer loopholes (fair is obviously a matter of opinion). But note that we have moved the goalposts here from a discussion about economic opportunity/inequality/what have you to a discussion about government policy and taxes...so I'm unclear if the original point is still being addressed.