Do any of your contracts even TRY to index pay with inflation? Or does our union just suck?

On a whim I ran some numbers and teachers at the top of our pay scale have gotten 15% poorer in the past decade. It’s even rougher when we see that our contract for the next 3 years doesn’t even increase 2% per year. Rougher still when the police union negotiated a 4.5% increase year over year at the same time.

Is this just my district or are others feeling this as well?