I was just about to post a new thread as I recently noticed this. I emailed the FIRECalc creator a couple of weeks back but never heard back. Here is what I said in that email:
"In the "Pensions, "Off Chart" Spending Changes, etc. section, when I select Pension Income...I'm always seeing what appears to be an inflation adjusted increase irrespective of whether the "Inflation adj?" box is checked.
The pension I'm scheduled to receive is not inflation adjusted but when I review the results (within the "single-year" spreadsheet) the output for the pension increases identically whether or not that box is checked. The only way I could get it to remain constant was to change the inflation assumption in the "Spending Models" section to 0%
Actually, I would expect a non inflation adjusted pension to show as a diminishing value as the years progressed?"