I get paid way more than my coworkers, and even my supervisor, because when I got hired I immediately made a bunch of random tools in google sheets that only I know how to maintain, and spread them around until everyone was using them. Before long, I was essential to my department, and praised for going "above and beyond" even though I was mostly just dicking around making the tools rather than doing my actual job.
I have 0 coding experience, so the tools are absolutely horrendous behind the scenes, but that just means that they break pretty often, and people are reminded that only I know how to fix them. So, when I went looking around on LinkedIn for other offers after a few years, I eventually got one that was paying way more since it was in a major metro area, and I took it back to my manager to negotiate a 50% raise and a full-remote designation that virtually nobody else in my office is given.
You don't get ahead by working hard, and you don't get ahead by working smart to benefit the company, you get ahead by working smart to benefit yourself. Think about it this way - if you're at the store to buy bananas, and you see that they're selling bananas for $0.05 ea, you'll likely think "Wow, that's a great deal!" and buy a bunch of those bananas at the $0.05 price. You're not going to pay them the price you think would be fair for a banana, you're going to take advantage of the price you're allowed to pay so that you can save money. Your employer sees you - working for less than you're worth - as a $0.05 banana. You're nothing more than a cheap commodity they were lucky to snag on sale.