While the controversy opened by Édouard Philippe, Agnès Buzyn and Gérald Darmanin on the postponement of the retirement age is still not closed, the opponents of this measure make fire of any wood. They argue that, in a country where 25% of active youth are unemployed (versus 9.5% for the overall population), defer the retirement age of older workers would make it even more difficult for their insertion in the labour market. An argument appealing... but totally misleading. Not only the seniors do not take the work of young people, but the activity of older workers is, on the contrary, the bearer of growth, therefore employment for the youth.

And it shows. The rules of the labour market are not those of mechanics of the fluids: the job does not obey the principle of communicating vessels as may be a homogeneous liquid. This is not because the employment of older workers decreases that of the young people increases. On the one hand, because a ...