Frenchman Champagne, who left FIFA two years ago, has been tipped to run for the presidency.
Asked by France Football magazine how FIFA could become more democratic, he said: "Those who rule FIFA should not be in a position where they are accused of conflict of interest.
"To get there, it would be appropriate to...create a subsidiary company that would look after the commercial deals."
In January, Champagne circulated a 20,000-word report to each of FIFA's 208 member associations that examined how many of soccer current ills had developed.
It suggested improvements to the game and changes at the top.