Samuelson, Friedman and the politics of labels

Do we really believe that the economic problems of the 21st century can be solved by choosing between two T-shirts?

In public debate, it often seems that way. Some declare themselves in favor of intervention; others, of the market. Some invoke Samuelson; others, Friedman. And with that, it seems the discussion is closed.

When Samuelson is mentioned, many think of Keynes. The Keynes who advocated public spending to overcome crises, the economist who wrote during the Great Depression when the system seemed to be collapsing. That context was exceptional: massive unemployment, falling demand, financial paralysis. The State had to act because the market did not react.

Samuelson translated that intuition into a systematic analytical framework. He integrated Keynesianism into neoclassical economics, demonstrating that markets are very efficient under normal conditions, but that they may need stabilization in exceptional times. Intervention, yes, but under specific conditions. Stabilization, not permanent planning.

Friedman represented another historical experience. His influence grew in the context of the inflation of the 1970s, when discretionary policies seemed to generate more instability than solutions. He did not advocate for a stateless world, but for clear rules that would reduce uncertainty and prevent systematic errors. His message was not moral, but prudential: governments also make mistakes, and often do so persistently.

Neither argued in absolute terms. It was not a question of "state or market." It was a question of: in what context? with what instruments? with what limits?

Let's take the case of housing. When prices rise, the debate immediately becomes polarized. Some demand income control; others, more supply and fewer urban barriers. Some invoke intervention; others, liberalization. But the relevant question is not which name to cite, but what the diagnosis is. Is there a structural shortage of supply? Are there regulations limiting land use? Is there a concentration of ownership? Are there poorly designed incentives? Without this diagnosis, any measure, whether intervention or liberalization, can generate unintended consequences. The dilemma is not ideological, but institutional. And this is where the debate has evolved much more than it often appears. Joseph Stiglitz demonstrated that imperfect information is not a one-off anomaly, but a structural feature of markets. Buyers and sellers do not have the same information; incentives are not always aligned; decisions are made under real uncertainty. This means that even competitive markets can produce inefficient outcomes. But this finding does not automatically resolve the debate, since governments also suffer from problems of information and incentives. The question is no longer choosing between two flags, but comparing failures: When is the market most likely to fail? When is public intervention most likely to fail? And what institutional design reduces these risks? This is the contemporary debate. It's not about "more state or more market," but about better rules. Not slogans, but diagnoses. Not symbolic endorsements, but a rigorous comparison of alternatives. The paradox is evident. While academia talks about institutional quality, asymmetric information, and incentive design, the political debate remains anchored in labels from the last century. The problem isn't citing Samuelson or Friedman. The problem is pretending they represent static ideological blocs. Their contributions arose in specific historical contexts and responded to specific problems. Turning them into permanent slogans is to betray their spirit.

Today's societies are more complex, more interdependent, and more regulated than those of the mid-20th century. Economic decisions are made in an environment of technological, financial, and geopolitical uncertainty that those debates could not fully anticipate. Reducing this complexity to two T-shirts is convenient, but insufficient.

Perhaps the question isn't whether we are Samuelson or Friedman. Perhaps the question is whether we are willing to discuss real problems with updated categories.

Politics still evokes the 20th century. Economics has spent decades trying to understand the 21st.