Columbia University economist Joseph Stiglitz, former Congressional Budget Office Director Alice Rivlin and 2007 Nobel winner Roger Myerson are among those who signed the letter calling proposals to temporarily lift the tax a bad idea. Another is Richard Schmalensee of the Massachusetts Institute of Technology, who was member of President George H.W. Bush's Council of Economic Advisers.

The moratorium would mostly benefit oil companies while increasing the federal budget deficit and reducing funding for the government highway maintenance trust fund, the economists said.