You shouldn't care what your coworkers get paid. If you do, your setting yourself up for disappointment and holding a grudge against the people you have to work with every day. You should value your time period. You shouldn't value your time relative to those around you.
Discussion
Definitely a bad idea to fixate on
This sounds like some shit my boss would say to justify fucking me out of a raise.
Then earn the raise. The fact that someone makes more than you doesn't entitle you to more money...
No amount of money ever bought a second of time