Market forces

Remember the Bristol riots over a Tesco shop? Several police were injured and there were a number of arrests as the so called protesters had threatened to firebomb the Tesco store in their protest over globalisation. Eventually they set up a co-operative to offer an alternative by selling organically grown, local, fairly-traded food available to people on a low income in the area.
BBC.

A community supermarket set up to serve the Stokes Croft area of Bristol as an alternative to Tesco is winding up.
The aim was to make organically grown, local, fairly-traded food available to people on a low income in the area.
It began trading after riots in April 2011 when police raided a squat on Cheltenham Road over fears the nearby Tesco would be petrol-bombed.
A statement from the store said it could not compete with chain store prices and needed new leadership.

There are several reasons why organic produce is more expensive than factory style farming, the main one being that it's totally inefficient. crop levels tend to be at least a quarter of standard farming methods for pretty much the same cost outlay. Hence unless you're growing your own in your own time and at your own cost, you simply can't compete. Sure some people are prepared to pay more because it tastes better, but those aren't the ones this community supermarket were aiming at. They wanted to supply to people on a low income in the area.
People on a low income tend not to have great diets, because they have to budget carefully, that means they opt for own brand buy one get one free special offers. You sell organically grown carrots for £1 a kilo, and Tesco sell them for 50p. Guess where the low income family will go.
As the saying goes, you can't buck the market, this is a classic example of why. What people on a low income want is cheap, organic isn't cheap, it simply can't compete in the same market as Tesco's.