The Liberals are unwilling to face the gigantic elephant in the room, which is the promised benefits to our rapidly aging baby boomers, but they have instead created a pyramid scheme where they will rely on ever increasing levels of immigration to ensure these benefits. They are playing politics with peoples lives, and they know it.
Also, it's worth pointing out that the 500,000 new immigrants per annum translates into most of said immigrants voting Liberal, allowing them to pick up the "Natural Governing Party" mantle. If it weren't so short sighted and dangerous, I might say it's a brilliant scheme.
But hey, no need for the long face, at least we get some good ethnic food while our housing prices rise and our wages fall!