Government welfare programs are not bad because they, pragmatically, produce the wrong results but because they violate the Eighth Commandment against theft. The second area of disagreement is in his analysis of the lack of economic growth in certain nations. If a number of nations in the world could get the rate of population growth under control, they could begin to emulate the growth rate of nations like Japan. He contradicts himself later in a table presented on page 197. There is no correlation between these nations' growth rates of GDP and their population growth rates.
Population growth has nothing to do with economic growth.
Economic growth is the result of a nation's cultural and institutional structures. The greater the conformity of these to biblical principles, the greater the economic growth rate. But, and let all friends of the market system pay heed, capitalism needs Christianity.