In today’s Fin (subscription required) Sinclair Davidson has a response to my earlier article on the Greens’ economic policy. A couple of points in response. First, although he’s kind enough to describe me as “one of Australia’s leading theoretical economists[1]”, he’s happy to dismiss proposals for a Tobin tax as coming from the lunatic fringe, without noting that the late James Tobin was considerably more eminent than either of us as both a theoretical and a policy economist (at least that’s what the Nobel Prize committee thought). Similar ideas have been put forward by a more recent Nobel Prizewinner, Joseph Stiglitz. Of course, there are plenty of equally prominent economists who oppose the idea, but it’s certainly not outside the range of legitimate debate.
The second is a fallacy I’ve pointed out previously in Davidson’s work for the CIS. The Greens assert that middle-income earners pay more of their income in tax than high-income earners. Davidson denies this. His evidence? Australian Taxation Office data on the ratio of tax paid to taxable income. But the primary method of avoiding (and for that matter, evading) tax is the use of legal, semilegal and illegal devices for reducing your declared taxable income. Davidson’s ATO data proves nothing more than that the income tax scale is progressive. The Greens, and many others, assert that tax avoidance is sufficient to offset this progressivity. This is hard to prove either way[2], but Davidson has not even addressed the issue.
fn1. A backhanded compliment in the context of policy discussion, but still a compliment’s a compliment
fn2. My own estimate, FWIW, is that the two roughly cancel out.