I really cannot speak to the political side, because I really don't have experience in that, but on the public service side there are provisions in the employment conditions that say what is to happen when performance is below par. People have annual performance appraisals, for example. There is training and there can be reassignments and other sorts of things.
I think the clearest thing to say is that when there is consistent behaviour that is contrary to the norms, the organization has to look into whether something is a matter for forensic investigation and deal with it legally, but otherwise there are always constructive things that can be done to find ways to help people find the niche where they can perform well. It's part of the flexibility of everyday life in organizations.