Cato Senior Fellow Jagadeesh Gokhale argues today that S&P has left little doubt that credit rating agencies' credibility has suffered because of the recent downgrade of U.S. Treasuries. He argues that the response from the President leaves much to be desired. On the tax increases proposed by the President today to cover entitlement spending, he says
It's basically impossible to tax our way out of this commitment. If we try to impose huge taxes on the backs of workers and younger generations, we will destroy the incentives to work and destroy the incentives to people who can provide capital to provide it in the U.S. They would take that capital and migrate to other shores.
In other words, the taxes required to pay for past promises are uncollectible. Listen to the whole thing (and subscribe!):