In short Good Companies (not just high wage companies ) attract and hold and respect good staff, and staff in return work well.
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How often have we heard of companies , (they pay well but ?) they end up turning over staff and that ain,t profitable .
This is a well researched area, Maslow's work in motivation dates back to the 1940's. Once pay rises to a certain level where people feel secure, there's a diminishing return in any additional motivation/ commitment for further hikes in pay. Beyond that point, recognition, a sense of belonging and allowing people to reach their full potential is where it's at. Of course, it takes a really open and committed management infrastructure to foster that kind of environment.