I hate wastefulness, but it sounds like you were trying to conserve, which is a good motive. Just a mistake in cleaning CDs... A simple mistake.
Waste would be copying CDs, and just leaving them lying around and forgetting to label them, or not bothering to look for them before burning new copies, etc.
As far as being economical-minded, I do care about things like keeping the electric bill down by turning off lights & stuff I'm not actively using, but on the other hand, I do like to go for a Sunday drive in a 15,000 pound truck for no reason, and I like vehicles with huge, gas(or Diesel)-guzzling engines. Even my motorcycles get terrible gas mileage, but I chose to own them for reasons other than economy.
Charles