The effect of deficit spending depends on whether it occurs (1)
because of a reduction in taxes, or (2) because of increased
spending without an increase in taxes. It also depends on the
state of the economy, especially the employment level. At full
employment, deficit spending cannot stimulate the economy, and is
likely to be inflationary. I'll ignore the full employment case
here.
Deficit spending is really a simple matter. It means the government spends
more than it collects during a given fiscal year. Now government revenue
rises or falls according to the performance of the economy even without changes
in the tax rate or the tax base. Thus tax cuts by themselves may or may
not produce surpluses or deficits, the Laffer Curves not withstanding, because
the performance of the economy is subject to many other factors besides taxes.
Government surplus removes money from the economy and government deficit
injects money in the economy. The size of the money supply is important
to the size of the economy. Generally speaking, the larger the better, if
a growing economy is the aim. How the inject money is spend is a separate
issue - mostly an efficiency issue. Injecting government money will not
work to keep a debt bubble from collapsing, as a decade of empirical data
in Japan has shown. It works only if the economy suffers from a conventional
business cycle not excessive affected by debt. Even under full employment,
deficit financing can be useful to prevent on-coming unemployment. Fear
of inflation from full employment is purely an ideological mental block.
Full employment deficit financing needs not cause inflation since wages
can still go up to neutralize inflationary effrects, particularly under overcapacity
situations.
The demand side is almost always the problem. The key to
providing a near term stimulus then is to increase the purchasing
power of those who need to spend, or at least have a strong
desire to. Ultimately there must be increased hiring to provide
the income needed. There is no shortage of funds available for
business expansion, but there must be sufficient demand to
encourage that investment.
The main difference between two cases above are where the
benefits occur. The benefits of a tax reduction will end up
primarily in the hands of those less likely to spend the funds,
at least in the near term. The benefits of a spending increase
will go primarily to those who will spend when funds are
available. In both cases, the funds to cover the deficit come
from the investment of individuals or firms with an ample supply
of loanable funds.
William F Hummel