Some of the difficulty is that the team may be hiring people because they're currently under-staffed. I've been on teams before where we're 3 engineers on a team that we're trying to hire up to 6 people. It's really hard to both try to keep up the work of 2 people, even in maintenance, and spend hours every week on trying to hire the replacements. Even if the company is good about reducing demands for new work after a departure, it's generally true that you're hiring BECAUSE you need more people on the team, which often means that team is overworked already.