20 years to become a millionaire in the US - The UK's Economist magazine has attempted to identify the country where it is easiest to make a fortune. It calculated the average annual salary of households in 20 different countries before working out the amount of time needed to accumulate $1 million. The US was at the top of the league table with Americans standing the best chance of becoming a millionaire after 20 years of hard graft than elsewhere. At the bottom of the table are the...