Yes, of course some relative prices have changed dramatically! If you choose to hold constant the price of a customary work-week of semi-skilled labor, you get something quite close to dsr_'s calculation where the tunic costs as much as $1,500. But given that the goal of all economic activity, including labor, is consumption, the least bad choice would seem to be choosing some sort of indexing based on an average consumption basket - which is essentially what an "inflation calculator" does.