Must take exception to number 16, dealing with hiring of seniors and overqualified employees. You are totally off base with your analysis and your conclusion. There does not exist any current research (since 1980) which concludes that employees who have accepted positions for which they are deemed overqualified by someone, or have accepted less compensation, are any more or less satisfied with their job or “hate their jobs” as you describe.
Where did you find this research to validate these comments?

An “overqualified” candidate, as you call them, are just fully qualified candidates. Not hiring a candidate due to “overqualification” is age discrimination, plane and simple. If it's not, please demonstrate, with valid data, how NOT hiring that candidate who is fully qualified is otherwise justified.

You are welcome to read one of my recent blog posts (http://joelawhite.blogspot.com/) which specifically addresses “overqualified”.

You will, by the way, find extensive research which concludes that adequate compensation does NOT make an employee satisfied with their job. Other personal growth factors take precedent.