In 2008 , despite a sharp pull back in the 4th quarter, real (adjusted for inflation) GDP (Gross Domestic Product- the sum of all goods and services produced) was modestly positive for 2008. Compare that to GDP contractions of 1.9% in 1982 and 8-13% per year during the 1930-32 period. Job losses as a percentage of the workforce were identical in 1981 and 2008. The current unemployment rate of 7.6% is still well under the 1982 peak of 10.8% and but a fraction of the 24% jobless rate reached in 1932.
Economic policies should be grounded in a realistic and genuine understanding of economic history. In the main, this is not what we see at present.