They would if they had an exemption from the tax implications of doing that, and then they could invest in GICs and government bonds for the time period that they are serving the public, which would give them a fixed percentage return. They could then return to having their financial interests that are specific to them after they leave. I don't see any problem with that.
If good people want to serve the public, they should be happy while they are serving the public to leave their financial conflicts of interest and effectively set them aside. If not, they are essentially saying, “I want to have the opportunity, which the act currently allows, to profit from my decision-making and my role as a person serving the public. I want to serve myself just as much.” You don't want people like that in office; you want good people who want to serve the public.