But the COST of the interest is in year 0 dollars. I may be buying Cokes in 2015 dollars, but if the price is set in 1900 dollars I'm getting a shitload more Cokes.
I get what you're saying. If everything arou.d me has gotten more expensive and assuming my wages keep up with inflation, the interest cost is cheaper in later years relative to the earlier years. Makes sense but hasn't wage and inflation growth diverged in the last couple of decades making that assumption a questionable one?