This indicates Alberta (and Ontario and BC) don't pay higher tax rates. The equalization payments just come out of the general budget.
The US isn't all that much different. Wealthy states pay more per capita because it's an income tax, not a per capita tax. Looks like ~13 states pay more than they get back, with Massachusetts paying relatively more (-$5000/person) and New Mexico recieving relatively more (+$15,000/person).