Principles are ways of successfully dealing with reality to get what you want out of life.
Ray Dalio, one of the world’s most successful investors and entrepreneurs, cites principles as his key to success.
This is because 1) it is not their money and 2) it is difficult to know what the right price should be. For example, if somebody proposes a price of $125,000 for a consulting project, it is unpleasant, difficult, and confusing to figure out what the market rate is and then negotiate a better price. But the same person who's reluctant to negotiate with the consultant will bargain furiously when he is hiring someone to paint his own house. You need to have proper controls, or better yet, a part of the organization that specializes in this kind of thing. There's retail and there's wholesale. You want to pay wholesale whenever possible.