I always hated when employers didn't give cost of living, even to a shitty employee.... If they're so bad they deserve a downrank in pay, they should be fired. We typically will do cost of living and use that as their "warning", if they don't improve... Then we know not even money as a motivation will make them a better employee and they're gone.
You need to also be careful and look at indeed, LinkedIn, etc and see what others in your area are hiring for.... We just lost 2 graphics artists out of 3 because everyone in our area is hiring at $28-30 an hour... For a sign company graphic artist. So we lost 1 good employee, the second we were happy left... But now we have an add out for $28-30, we're getting shitty resumes... We increased our third artist to above $30 to keep him happy, and were backlogged.
So sometimes a buck or two isn't good enough, if the sign shop down the street is paying $5 an hour more, there is no loyalty and they'll hop on over.
Rates are going crazy right now in our area, I don't know how it is in USA... But over here it's a job hunters market not an employer's market. Just for shots and giggles I looked up production manager salaries on indeed.... There's about 6 people hiring for 100k a year for a signage production manager.... Which is kind blowing. It's a huge, huge pay bump.... But I'm happy where I am, and if wages stay the same it gives me ammo for next year's raise.
So just throwing that in there as well, you need to look at salaries to comparative companies and jobs in your area.
The last company I was at did an annual review of the going rate for wages, it was nice and prevented people from leaving for a few bucks elsewhere. They understood that hiring and training a new employee was more costly than giving an employee a few bucks raise.... So staying competitive with local shops was in their bet interest as well.