I think your point is you know when to stop. The real trouble is if you are having a streak of luck, you would be absolutely certain there is no reckoning for

I think your point is you know when to stop. The real trouble is if you are having a streak of luck, you would be absolutely certain there is no reckoning for your deeds coming, this could go on, until it doesn't. At that point in time punishment/prison looks a heavier price to pay in return for a incremental gain.