I'd like to express the cost of items in a document that can help with spending decisions in the long term. For instance, an item costs $30, with the minimum wage being $15/hr. in the present year.
If I express the cost of the item as a ratio of the minimum wage, i.e.: 30 / 15 = 2, it would indicate one would have to work for 2 hours at a minimum wage to obtain the item at the present time.
Would it then be reasonable to use this information and compare it at a future time, where if one has to work less time at minimum wage to obtain the same item, then the cost of the item has actually decreased, even if the item's dollar value had increased?