Sure, making changes solely for the sake of creating jobs is the broken window fallacy. However, if there is an otherwise legitimate need for changes to the tax

Sure, making changes solely for the sake of creating jobs is the broken window fallacy. However, if there is an otherwise legitimate need for changes to the tax code, I don't see how this applies. I'm guessing you're not advocating that the tax code be set in stone, never to change ever again, lest someone have to do work. Back to my original question: how to you determine which tax changes to support and which to oppose?