The only difference between the Green Hornet and any other aspiring crime lord is motivation. The only thing that makes the plan of posing as criminals just a front is the fact that he and Kato don't actually set up their own criminal empire in place of what they tear down.
Mokalus of Borg
PS - They let someone else do that.
PPS - I suppose, on balance, it would work out, at least at the top.