That entire article seems to avoid saying how much INCOME each of those groups are. Yes, the top 3% pay 37.5% of income taxes. But is their total income less than or greater than 37.5% of the total?

Without the numbers, its kind of meaningless.. that is like saying bill gates moves to a town of 50 people, and suddenly pays 99.999% of the taxes.. its expected, unless you give the mean, median, etc, of income.. not just of how much he paid.