Both of these measures were on the side of increasing spendable income, though unfortunately they were largely without effect. The tax reductions were negligible except in the higher income brackets; businessmen who promised to maintain investment and wages, in accordance with a well-understood convention, considered the promise binding only for the period within which it was not financially disadvantageous to do so.
Chapter IX, Cause and Consequence, Section V, p 183 - The Great Crash, 1929 (1954 and 1997)