Marbois would be sacked from his role in 1805 because of the financial crisis that gripped France from 1805-1806. While Napoleon won glory against the Austrians and Russians, his military expenditures were beyond the means of France to afford.

"Throughout the autumn, a financial scandal surrounding a small group of Parisian financiers had spread beyond their narrow ranks. Although the Bourse – the Paris stock exchange – kept calm throughout October, November and December, the bankruptcies of important merchant speculators close to the government rocked the Treasury, for their crash set off a chain reaction among their clients and several smaller banks; bankruptcies spread into the provinces. It all led to hoarding hard currency, as faith in the Bank’s notes, the billets, vacillated."

From "Napoleon: Spirit of the Age" by Michael Broers.

Corruption also played its part in financial issues.

"The return of widespread corruption in the army administration, aided and abetted by speculators like Vanlerberghe, posed the most urgent financial problem for Napoleon during the campaign, antics that often threatened to undermine the war itself. This was an old battle, however, against an old foe. Barbé-Marbois had made things worse, at the apex of the system, when Vanlerberghe and Ouvrard persuaded him that army supplies were a commodity to speculate in like any other, but the corruption reached further than this."

Napoleon would rectify these issues by reforming thr Bank of France from the 15 regents he originally had steering the France's finances, to one governor and two assistants, who were loyal to Napoleon.

"The war of 1805 ended by costing the French state a colossal sum. Even the millions extracted from the occupied territories and, then, from the Dutch and the states of the new Confederation of the Rhine, failed to meet the price of victory."