Indeed, you working more is lowering the bar for employers, you're helping them to pay less and abuse their workers. (Let's ignore for a minute that I don't work for these employers).

Since career success is linked firsts and foremost to negotiating offers and following a career plan, I demand that you negotiate better and follow a more aggressive growth plan! It will give you more returns for less efforts than long hours.

I am on the high end of the spectrum, I actually need others to pursue their career success better in a cynical ploy to improve my position. ;)