The reluctance to do something well only because you’re unable to make it excellent = Don’t let the perfect be the enemy of the good.
I want to remind people of this when the topic turns to government spending. Lately, I hear certain pundits dismiss the importance of limiting government spending as a step toward fixing the financial crisis in Washington. I hear things like, “Well, sure, they (the government) could cut programs X, Y, and Z, but really, that spending amounts to a trifle of the government’s budget.”