Dairy farmers in the UK were complaining that some supermarkets were paying them less for a litre of milk than what it cost them to produce the milk. After protests from farmers, those supermarkets - which included Aldi, Lidl, Asda (owned by Walmart), and Morrisons - agreed to pay more for the milk price.
The cost of milk is pretty cheap in the UK. Four pints (2.27 litres) of fresh (not UHT) semi-skimmed milk is usually 90p to £1 in most UK supermarkets (that'a approx €1.37 or $1.50)
"Dairy farmers are like any other business in that many can stand to be more efficient."
I don't know if farming practices are inefficient in the UK, but it's worth asking: what does efficiency mean when it comes to farming and animal welfare? I don't want to see dairy farmers go out of business or for milk to be imported. And I don't want to see more "zero grazing" farms where intensive indoor grazing is the norm and cows have little or no outdoor access. Intensive farming methods like this are already used in the UK and continental Europe and look set to grow. Perhaps it's really for us as consumers to ask: what price are we prepared to pay for milk?