If there is one thing that most economists agree about in the realm of tax policy, it is that it's best to broaden the base of any tax, all else being equal. That means minimizing the number of deductions and exclusions from taxable income in order to lower marginal rates and reduce distortions.
Richard ThalerRelated topics
base best equal lower marginal number order tax thing meansRelated quotes
An income tax intended to reduce inequality and promote the diffusion of wealth has in practice fostered reinvestment of corporate earnings, thereby favoring the growth of large corporations, inhibiting the operation of the capital market, and discouraging the establishment of new enterprises.
Milton Friedman
Mundell's models allowed a significant role for fiscal policy, especially under fixed exchange rates. However, the treatment was entirely Keynesian-an increased budget deficit operated solely by raising the aggregate demand for goods. Moreover, increases in government spending and cuts in taxes had pretty much the same effect on the economy.
Robert Barro