To that I would add that government advertising serves a number of purposes, and I would carve that up in a slightly different way. I would say there were contentious and non-contentious issues. The vast majority of advertising is on non-contentious issues, and people don't have a problem with it. They fall within the realm of acceptable information.
What we are concerned about is the tip of the iceberg that is contentious. There may not even be a large amount of money spent on it, but it goes to the heart of what is being discussed in civil society, and that's the appropriate place that members of Parliament and others should have in persuading citizens about the benefits or drawbacks of those policies, not government.