Taking into account all taxes on earnings and consumer spending—including federal, state and local income taxes, Social Security and Medicare payroll taxes, excise taxes, and state and local sales taxes—Edward Prescott has shown (especially in the Quarterly Review of the Federal Reserve Bank of Minneapolis, 2004) that the U.S. average marginal effective tax rate is around 40%. This means that if the average worker earns $100 from additional output, he will be able to consume only an additional $60.
Research by others (including Lee Ohanian, Andrea Raffo and Richard Rogerson in the Journal of Monetary Economics, 2008, and Edward Prescott in the American Economic Review, 2002) indicates that raising tax rates further will significantly reduce U.S. economic activity and by implication will increase tax revenues only a little. …
The economy now faces two serious risks: the risk of higher marginal tax rates that will depress the number of hours of work, and the risk of continuing policies such as Dodd-Frank, bailouts, and subsidies to specific industries and technologies that depress productivity growth by protecting inefficient producers and restricting the flow of resources to the most productive users.
If these two risks are realized, the U.S. will face a much more serious problem than a 2013 recession. It will face a permanent and growing decline in relative living standards.