SNIP
>This is a mistake made by the right wing all of the time, which simply ignores the facts. The bulk of income tax is collected from the middle class, since they are the most numerous.

I guess you are referring to Canada because that simply is not so in the U.S. The facts show otherwise.

http://www.cbpp.org/4-13-05tax.htm
http://www.factcheck.org/article280.html

Share of federal tax burden:

Lowest 20%   1.1%
Second 20%   5.2%
Middle 20%  10.5%
Fourth 20%  19.5%
Top 20%     63.5%
Top 5%      35.9%
Top 1%      20.1%

While there are many references which claim different amounts, the percentage difference each one sites is very close.