At the time, and I believe the Prime Minister spoke to this when he appeared before committee earlier, he believed that the option for administering the program might be the Canada Service Corps, which he'd long been looking at and working on. He was, I think, a bit disappointed much later when he learned that the only way it could be done was to go to a third party organization for the purposes of this summer.
On July 30th, 2020. See this statement in context.