Wages maxed out at $25

I'm on my third play through. The first two times, I was able to raise wages to whatever I wanted.

On this play through though, I can't raise wages past $25. There's a red line half way down the slider showing the hard limit. This is going to be a problem because my high school education wage is approaching $20, and I don't want to discourage people from going to college.

Why can't I raise wages past $25, and how can I fix it?

I don't play this game, but after looking around some, there seems to be some sort of limit when you have the Cheapskate trait. This Reddit mentions it:

You can also get a red bar for maximum wage with the cheapskate leader attribute.

Looking at the Wiki for the trait Cheapskate:

-10 respect with the Communists, maximum salary is set to $25/month

I recommend you take a look at the traits you have for your presidente. If you have the Cheapskate one, then I think you have your answer.