Different groups have different moral codes. If you're a highly respected, professional burglar then not taking something so good could be considered professional misconduct.

The origin of the word "sin" as most people use it today is a word from archery. It means hitting the target but missing the center. Pretty apt for a renowned burglar to not take something which is highly valuable and very portable on a robbery.

I guess its a comment about the morality of the rich. The idea being that to get rich, whatever rich is, it is assumed that they effectively stole from the poor. So taking it back is re-appropriation, or some such.

Personally, I see tax as the civilised way of doing that. Granted, that doesn't work that well, but then given our democracies, that up to the masses to vote for it, who are basically the poor.

Or, y'know, figuratively...