Yeah, they'll probably need that bonus we're giving them. I'm guessing that Mari isn't paying them anywhere near as much as they probably deserve, considering what they're contributing to Leaf. She thought they'd just be flying kites the whole time.
That's determined by Gaku, and Hazo already gave them bonus multiple times.
That said, how much money they get isn't nealry as important as the supportive environment that Hazo fostered, especially since Hazo is paying them to do research to explore concepts that may not pan out.