If everyone did that we would need a lot more bicycle tires.
Edit: If you want a more extreme example. I might be able to afford more socks by doing paid work than I can wash in the same amount of time.
If everyone did that we would need a lot more bicycle tires.
Edit: If you want a more extreme example. I might be able to afford more socks by doing paid work than I can wash in the same amount of time.