Just because you're helping your employer doesn't mean whatsoever that they're necessarily taking advantage of you or exploiting you.
That's just some deeply cynical shit. You can do your job, enjoy it, care about the work your produce, and go home 8 hours later, all while holding a healthy attitude for your employer and at the same time yourself.
"Stack your money and gtfo" is just sad. I feel bad for you, if that's the attitude you bring to work.