Friedman argues by example of course. He argues for rebuilding the country's infrastructure, which would of course be a great thing. However, he wants the country to pay for it with more taxes on the middle class and cutting Social Security benefits.
A skilled columnist would know that the U.S. Social Security system is already among the least generous of the OECD countries. A skilled columnist would also know that most near retirees will have almost nothing to support themselves in their retirement other than Social Security because the people who Friedman thinks of as experts (economists) are not very good at their jobs (i.e. they allowed the housing bubble to grow to a level where its collapse would inevitably wreck the economy and destroy the savings [mostly home equity] of near retirees).
A skilled columnist would suggest a tax on the people who have profited from and caused the economic decay of the last three decades. Specifically a financial speculation tax, which could raise more than $150 billion a year while discouraging financial speculation and reducing the drain of resources that the financial sector imposes on the economy.
A skilled columnist would also know that the real source of the long-term budget problems projected for the United States is health care. A skilled columnist would focus on the need to get U.S. health care costs in line with the rest of the world as the only way to fix the country's long-term budget problems as well as removing an enormous source of strain on the private economy.
But Friedman shows that the U.S. economy still has good paying jobs for people without skills by writing a column that addresses economic issues with no apparent awareness of most of the relevant facts. If the NYT had more op-ed positions it could go far toward reducing inequality.