I heard similar at my company. But every year I write a letter requesting a raise and send it to at least two people in the company. "One of the owners..." then send the letter to more than one owner or an owner and your direct manager. That owner probably wouldn't re-iterate how cheap they are if a direct-hire is cc'ed.
In the letter, I politely explain my recent contributions, the fact I have competing interests and other opportunities but would like to keep working there. I don't make it sound like I have one foot out the door but it's implied I am standing near the door and it's up to them to keep me.
I have never failed to get a raise in over 10 years. When I shared this with a co-worker (contractor), I learned she hasn't received a raise in 4 years. Same goes for the other contractors (5+ years?). The money is there, so just ask for it. If they don't have the money for a modest raise then it's sinking ship.