Low prices are good for the economy, and they are morally good and help human society progress. You choose to pay more for better, more ethical goods because i

Low prices are good for the economy, and they are morally good and help human society progress. You choose to pay more for better, more ethical goods because it is worth it to you to do so. For others it may not be worth it because they have a lower salary, or an alternative to consuming that good that is cheaper (like choosing to bike rather than drive a car). Having a cheap crappy option in no way obligates anybody to choose that good, and may even create economies of scale that create cost reductions across the board. Even though we may not want the cheapest version, for somebody else it might make a huge difference.