> Keep your knives sharp
Or throw away blunt knives and purchase new ones every once in a while. Many people can't be bothered with sharpening their knives, so it's better for them to just get new ones. Or send them to professional sharpeners.
Pay someone to sharpen them for petes sake. I can't fathom why you would suggest that seemingly off hand, secondary to throwing away and buying new knives.
For people like this, the best path is probably to buy cheap knives and a one of those cheap knife sharpeners that destroys the blade over time. One of those angled carbide sharpeners believe a terrible edge, but better than a dull knife.
I guess if you prefer nicer knives, you could always buy new ones periodically and give the old ones away on buy nothing to someone who will take care of them.