Ahhh... but...
Stealing is stealing.
Thus the reference to the unsustainable financial strategy.
Let's substitute the word 'torture' for stealing. Is it ok to torture a person because he tortured others? (well maybe not the best example, but you get my drift.)
Robin Hood was about serfs who had every last thing taken from them. It's like a 100% tax rate. That's not sustainable.
Ah, but stealing is not always stealing. The enemy in Robin Hood was the government. It used its power to take what it did not deserve. When the government is the thief, there is no redress. One can either throw up one’s hands, or take back what was stolen in the first place. Robin of Loxley was a landowner whose lands were stolen by the Sheriff, with the monarch’s approval. Robin used similarly disenfranchised men as his troops. I call it justice.