They exist to make money, not to enrich their workers. The optimisation strategy is to pay as little as possible for as much productivity and labour as possible, then charge as much as possible for it to customers as a package item. Everything trickles up to the top of the pyramid.
Sadly the only way to reliably increase your pay is to dust off your CV and change jobs.
You might get a counter-offer from your current employer if they feel you're particularly valuable -- but I'd never accept one. At best, you'll end up being higher paid than some or all of your colleagues, and if they find out or suspect that (they certainly will if you flip from "I'm leaving" to "I'm staying") then you should expect resentment from them.
It's really better to walk away and start with a clean slate in another place. I've never regretted moving jobs -- but I've definitely regretted staying at a bad one, or one which didn't value my input.