the relationship between the number of people that you have to employ to look after abusers vs the number of people that are actually productive is a good way to measure your success.
Yes. That is what I said. The workman with internal-locus-of-control improves his value-creation system based on feedback, and is seen as more successful. The workman with external-locus-of-control blames parts of his value-creation system for acting (in his eyes) wrongly, and is seen as less successful.