Good questions. And to riff off of that, and in reference to Shakespeare's King Lear, does Divine Justice even exist, or do we live in a hostile, indifferent universe where the innocent are punished along with the evil? I'm betting on a terrifyingly ambiguous conclusion.

In the broadest sense, Walt and (initially) Jesse saw money as their ticket to happiness, freedom and security. Same for Mike, Gus etc. But ironically, their hard-earned cash has bought them and their loved ones nothing but suffering.

In addition to the Shakespearean references this season, it seems that like Dante's Inferno, ironic, hellish punishment is meted out to sinners on the show, without exception or consideration for how otherwise like-able or repentant they are.