Depends what you mean by "waste". I would expect an economist, politician or business man to use such a term, but engineers should know that money isn't "a thing" but is merely the virtual representation of a bargain.
Well OK not waste. Entropy increase without doing useful work.
But as an engineer I have to deal with economists, politicians and especially businessmen. So I like to talk in language they can understand. Otherwise I don't get the assignment and/or my projects don't get funded.
So consider my posts as a language lessons and you can't go far wrong. Or get your shorts needlessly in a knot.