I am talking about the accumulated evidence of the last 5 years that our present tax system, developed as it was, in good part, during World War II to restrain growth, exerts too heavy a drag on growth in peace time; that it siphons out of the private economy too large a share of personal and business purchasing power; that it reduces the financial incentives for personal effort, investment, and risk-taking. In short, to increase demand and lift the economy, the Federal Government's most useful role is not to rush into a program of excessive increases in public expenditures, but to expand the incentives and opportunities for private expenditures. [...] While rising demand will expand imports, new investment in more efficient productive facilities will aid exports and a new economic climate could both draw capital from abroad and keep capital here at home.