France's Parliamentary Inquiry Pushes Out Long-Held Top-Income Tax Data

France's long-running assumption that the wealthiest are, by nature, tax evaders is being tested by new official data. In a commentary published by Les Echos, economist Jean Peyrelevade notes that the Direction générale des finances publiques (DGFiP) has finally released information it has held for years — but only after the Assemblée nationale created a commission of inquiry into the taxation of the highest assets and incomes and their contribution to public services.

Peyrelevade asks why successive finance ministers did not systematically have such documents produced and published. He singles out Eric Lombard, one of the most recent finance ministers, who said in January that 'among the wealthiest people, thousands have a reference tax income of zero' — a claim Peyrelevade says was made without providing the serious supporting elements available to the ministry.

The core argument of the column is that France's richest taxpayers already pay proportionally more tax than other income groups. From that premise, Peyrelevade rejects the tax on 'economic income' defended by economist Gabriel Zucman, calling it an economic misunderstanding rather than a viable basis for policy.

The available excerpt does not include the detailed DGFiP figures or the full design of Zucman's proposal, so the precise numbers and definitions behind the debate remain to be seen.

Peyrelevade's Case Against Taxing 'Economic Income'

Peyrelevade's intervention is best read as a defence of existing fiscal progressivity against a conceptual alternative. The column advances two claims: first, the richest French taxpayers already bear a proportionally larger tax burden; second, the 'economic income' tax promoted by Gabriel Zucman rests on an economic misunderstanding. The available excerpt does not spell out the precise base of Zucman's proposal, so the exact differences in taxable definitions cannot be independently verified here.

Why the DGFiP Release Changes the Debate

The new figures matter because they can shift the burden of proof. Until now, the debate has often run on anecdote and assertion. With the tax authority publishing data it has held for several years, the conversation can move toward comparing effective tax rates across income and wealth groups. Peyrelevade's argument is that those comparisons, done properly, do not support the image of the ultra-rich as lightly taxed.

The Political Mechanism Behind the Publication

The release followed the creation of a parliamentary inquiry, which suggests the data was a response to institutional pressure rather than routine disclosure. Peyrelevade uses that sequencing to ask why successive finance ministers did not insist on systematic publication earlier. His criticism of Eric Lombard fits the same pattern: a politically effective claim made without the supporting detail that was available inside the ministry.

What to Watch in France's Wealth-Tax Debate

For French taxpayers and advisers, the column identifies the next front in the fiscal debate rather than an immediate change in law. The practical points to watch are tied to the parliamentary inquiry and any follow-up proposals.

  • Watch the Assemblée nationale inquiry's final report, which is the formal next milestone after the DGFiP data release; that report may determine whether Zucman's 'economic income' base advances from concept to draft legislation.
  • Treat Eric Lombard's claim about thousands of wealthy taxpayers with zero reference tax income as unresolved until DGFiP publishes the underlying distribution behind the newly released figures.
  • If advising high-net-worth clients, separate a legal taxable-income calculation from a broader 'economic income' measure; Peyrelevade's column argues that the current system is already progressive on the former, while the debate is really about the latter.