Emmanuel Macron, now the President of France, didn’t always work in politics. From 2008 to 2012, he was an investment banker at Rothschild & Cie Banque, a prestigious financial institution. During this time, he made a significant amount of money—around €2.9 million—according to the Financial Times. His rapid success at Rothschild led to him being promoted to partner just two years after joining.

But Macron’s connection to the world of high finance has always been a controversial part...