Several writers on WB have brought up this "fact" of current American demographics. The intent of this statistic is to prove that the wealthy are footing the bill to keep government going.
I can't verify whether this is true or not; maybe other American WB contributors can speak to its truthfulness. But I'll just give a Canadian example.
The threshold to pay income tax in Canada is about $12,000 a year. Any income over that is taxed at 25%. This means someone making $13,000 pays $250 in taxes and someone making $20,000 a year pays $2,000 in taxes.
Most of the people under this $12,000 threshold are young people going to school. They are just working part-time or during the summer. It is kind of hard to justify taxing this economic group, for they just don't have that much money to give to government. $12,000 might keep a single person in food and shelter, but it is not a good life.
If a Canadian worker finds a fulltime job at minimum wage, they earn around $22,000 a year, which means $2,500 for their taxes. They would be regarded as a taxpayer.
If Canada and US are fairly similar countries, than that 44% figure suggests that many, many American workers are far below the threshold to pay taxes.
If this 44% figure is indeed correct, then the seeds for a serious revolution have been sown.