Not for the feds. It's calculated as years worked as a percentage of your average high-3 consecutive, same as when I was working in a hospital. Is there a state government I should be going to work for? Or is there a private industry employer you're thinking of?
A disability claim isn't a pension. If you were military, you paid into it with blood sweat and tears. If you were private or government, you would have paid into the insurance program, usually getting paid less than your private sectors peers all along. Only one of those is government money, though, but if you want to crusade against military disability be my guest.
I'm an accountant, not a CPA (yet) but I am familiar with accounting for pensions. Maybe you can elaborate a little more specifically, might make a good paper for my state board of accountancy.
In short I am referring to union jobs.