Ok, you want to compare the US and GBR? The income level looks on par, but the cost of living tells the story -
http://www.numbeo.com/cost-of-living/compare_countries_result.jsp?country1=United States&country2=United Kingdom
Consumer Prices in United Kingdom are 30.44% higher than in United States
Consumer Prices Including Rent in United Kingdom are 27.97% higher than in United States
Rent Prices in United Kingdom are 22.24% higher than in United States
Restaurant Prices in United Kingdom are 41.07% higher than in United States
Groceries Prices in United Kingdom are 16.07% higher than in United States
Local Purchasing Power in United Kingdom is 32.04% lower than in United States
Now, I'm all in favor of trustbusting and making sure competition is the name of the game in the marketplace. I agree with you there that killing monopolies is the duty of a responsible government over a capitalist system. But that's not what's happening - the market isn't diversifying, it's being nationalized, which is the very antithesis of competition.