What I don't understand about investing in criminal activities is what's stopping them from taking the money and running. It seems to me that once you've done

What I don't understand about investing in criminal activities is what's stopping them from taking the money and running. It seems to me that once you've done one job, you'll have plenty of money to continue your activities. Is it that other pirates will come after you, or is there just an insane amount of overhead that I don't see?