Or so goes the conservative mindset on the subject.
Of course, all this political theory can be tested and we can examine the results.
After WW2, Truman was trying to establish the full vision of the New Deal, but the GOP blocked him from doing so.
To prove that the GOP was wrong Truman set up Western Europe to embody those Keynesian ideals. West Germany, France, and the UK all got the same treatment. Norway, Sweden, Denmark, the Netherlands, Switzerland, and Italy all very much followed suit.
They established universal health care, made unions powerful, and in Germany they even made it a requirement that union members sit on the executive board of companies.
This resulted in Europe becoming the the strongest economic powers in the free world, only overshadowed by the United States.
This has stuck in the crawl of conservatives ever since, especially the free marketeers. And so they set out to establish their own case studies to prove that free markets could establish a better society than the Keynesian big government model.
Case study #1: Chile. Under the new military dictatorship of Pinochet, a free market was estabilshed. The result was that inflation reached nearly 400%, the highest in the world, and 70% of incomes were needed just to buy bread. Verdict: FAIL.
Case study #2: Argentina. A similar model was applied in Argentina in '76, and within a year wages lost 40% of their value, poverty skyrocketed, and the military juanta disappeared any dissidents. This led directly to Argentina's entire economy collapsing. Verdict: FAIL.
Case study #3: the UK. Thatcher privatized much of the UK's state industry, but was unable to fully establish a total free market model. The result again was that poverty skyrocketed, CEOs fortune's soared, and the UK was plunged into debt. Verdict: FAIL.
Case study #5: Russia. With Gorbachev forced out of power, Yeltzin sought to establish a free market vision for Russia. The result was that Russian GDP fell by 50%, vast sectors of the economy was wiped out, unemployment skyrocketed, hyperinflation wiped out personal savings, and millions were plunged into poverty. Verdict: FAIL.
Case study #6: Iraq. When the US invaded in 2003, the Baathish government was overthrown, and Paul Bremer sought to establish a free market vision for Iraq, and Rumsfeld even boasted that Iraq had some of the "most enlightened and inviting tax and investment laws in the free world". Bremer fired 500,000 state workers, who without an income joined the resistance movement. Billions were spent for private business to reestablish electricity and water supplies, both of which were not built. Verdict: FAIL.
This led Steven Colbert to opine at the White House Correspondents Dinner that, "the government that governs least, governs best, and in that respect we're doing a wonderful job in Iraq."
Indeed. Unfortunately, the lessons of history has yet to catch on for the free marketeer capitalist fundamentalists in the United States.
"Those who cannot remember the past are condemned to repeat it." - George Santayana