Politicians live in a world of logic and passion trying to mate. Grassroots movements spring very quickly and die very quickly.
Professional politicians have to be there all the time.
Time and time again, the average voter feels he's voted for something and later feels he's been sold down the river. The problem for government is to decide what we do not need to do. Governments just can't move fast enough to get things done. The private sector can. Governments that are elected on a specific platform always seem to do the opposite.