Or simple math because if purchasing power of currency goes down by 2% then nominal profits have to increase to maintain the same profit margin.

If a business has a 3% profit margin, would you expect them to have a 2% profit margin 5 years from now, and 1% profit margin 10 years from now, and 0.1% profit margin x years from now?

Replace "business" and "profit" with "employee" and "raise" and ask the question again.