Thank you chaps.

I am going to stop using ASDA - the UK Wal-Mart subsidiary.

I'm not sure Tesco's, or Sainsbury's, or Safeway are really better, but they could not be worse.

The bigger problem is that the conduct of Wal-mart is merely the logical development of capitalism. If you want a better world, you are going to have to accept a larger measure of dirigisme in the economy, because if you permit laissez-faire capitalism, you will get Wal-mart behaviour.