"But all employers and employees don't have binding agreements/contracts..."
Very true .... which would be very fortunate for most workers in the aftermath of the FairTax's passage. With GDP growth in excess of 10% in year 1 of the FairTax world, businesses will be competing heavily for quality workers. That will exert upward, not downward pressure on wages. It seems to me that you are the one who was concerned about inflation in some of the older threads for just this same reason.
You're confusing inflation with exorbitant 30% statutory price increases due to taxation.
With GDP growth in excess of 10% in year 1 of the FairTax worldWhat makes you think that GDP will grow in excess of 10% in the first year?