Taxation is a political question
The central tenets of Laffer’s supply side economic theory argues for limiting government and cutting tax rates, especially the rate levied on top earners, which Laffer argues will unleash faster economic growth.
A curious artefact of Laffer’s thought is the eponymously named Laffer curve. The curve resembles a boomerang, plotting the tax rate and tax revenue on separate axes. The curve’s logic dictates that there’s a point where raising the top rate of tax becomes counterproductive, decreasing tax yield. It’s beguilingly elegant, a simple non-threatening curve that’s easy to understand at a glance.
The problem with the curve is its wrong on two levels, both mechanically and philosophically. For instance, the curve argues that a 100% tax rate would stop all activity – but that’s not strictly true, said Richard Murphy. He pointed out, that this was the model under which Soviet Russia operated. “As a policy, it was absurd – but it does suggest the curve was wrong,” he said.
“It’s fundamentally useless,” added Jolyon Maugham, a QC and economist who astutely deconstructed the Laffer curve in a recent blog post. “There is no one Laffer curve because it changes from day to day,” Maugham said.