This quote assumes that the employer refuses to acknowledge the employee adds more value than what their compensation represents.

I'm always of the mind that my value to my employer is 1.5-2x what I'm actually getting paid, at the low end. Asking for more money is simply trying to better negotiate the way I'm compensated for the value I'm already delivering. If my employer fails to recognize that, I've learned no amount of loyalty to the employer or flexibility to try to do more can change that.