Energy Tariffs

I always find this a hassle. WHY do we have to have such confusion over suppliers and tariffs? I am not one to change suppliers to get a better deal as the prices usually go up to match within months.

Call me old fashioned but I'd prefer ALL energy supplies to be nationalised (gas, electric, oil, wind etc) so the customer rather than a few shareholders benefit. It seems odd that something we ALL depend on is in private (profit motivated) ownership where the first responsibility is to shareholders rather than customers. Surely in all forms of energy, the customer should be the number 1 priority?

I was very impressed in Iceland 2 years ago: garage prices were the same everywhere in the country whether in towns or out in the wilds. You knew you were always getting the best prices for petrol or diesel. Simple.
 
How much easier it would be if we had a national energy supplier offering all customers the very best tariffs? They say competition is "good" but I question this for essentials like energy. Surely when it comes to domestic gas, electricity or oil we all want clear tariffs with the lowest costs together with security of supplies? How can this be so in a market driven economy? We are trading the needs of customers against the dividends and share values for a few. This cannot be right or fair.