When the quality of a good improves, what happens to the purchasing power of the dollar?

Question

Quizplus · Accepted Answer

When the quality of a good improves, the value you get for each dollar spent on the good increases, effectively increasing the purchasing power of the dollar. However, if the Consumer Price Index (CPI) does not adjust for this quality improvement, it may suggest that consumers are getting less for their money than they actually are, thus overstating the change in the cost of living.

When the Quality of a Good Improves, What Happens to the Purchasing