IMHO these stats are misleading. They reflect taxable income only and are not a true reflection of what a lot of people are earning.
How many thousands of Doctors/Lawyers/Business owners pay themselves a salary of $59,000 (taxable) while their practice/business reaps $250,000 ?
I think the published average is dragged down by all those on welfare and high earning individuals earning a modest TAXABLE INCOME.
The figures are good for the government as most people think they aren't doing too badly compared to others so paying 48.5% tax is easier to swallow.
You only have to look around at the local marina and see millions of dollars worth of yachts/boats which proves that a lot of people are wealthy.