The full article is here:
http://online.wsj.com/article/SB121124460502305693.html"No matter what the tax rates have been, in postwar America tax revenues have remained at about 19.5% of GDP."
The basic premise is that tax rates don't affect what the government actually pulls in, it's overall GDP that affects tax revenue. Since the percentage of GDP generated in tax revenue is relatively constant, the only way to grow tax revenue is to increase GDP.
The data show that the tax yield has been independent of marginal tax rates over this period, but tax revenue is directly proportional to GDP. So if we want to increase tax revenue, we need to increase GDP.
Economists of all persuasions accept that a tax rate hike will reduce GDP, in which case Hauser's Law says it will also lower tax revenue. That's a highly inconvenient truth for redistributive tax policy, and it flies in the face of deeply felt beliefs about social justice. It would surely be unpopular today with those presidential candidates who plan to raise tax rates on the rich if they knew about it.
"Raising taxes encourages taxpayers to shift, hide and underreport income. . . . Higher taxes reduce the incentives to work, produce, invest and save, thereby dampening overall economic activity and job creation."
No big revelations, but it is an interesting article. Too bad the people who implement our economic policies don't actually have to understand economics.