It's very controvertial, and I don't agree with the approach taken. But I think it's an issue that has to be considered head on rather than swept under the carpet as currently happens -- many of the problems in the world at large are due to over population. The only reason such a population is sustatinable (at least in the medium term) is because of the intensive methods developed to exploit the world's resources, which is now coming home to roost with the energy crisis that is developing.
Of course we cannot "get rid" of people, so the solution is to attempt to discourage people from having so many children. Governments in many "developed" nations are setting a very poor, short-sighted example by doing the opposite; yes there is an issue with the population ageing meaning that tax incomes will fall while demand for services increases, but that is the harsh reality we have to go through over a generation or so to solve the problem. Encouraging population growth to counter the effect of people living longer is a very short sighted approach, which is too focused on the current generation. Personally I think that the system in this country giving "tax credits" to everyone who has a child is a bit of a joke really, and is very much the opposite of what the world needs. Of course tackling the problem of population growth in developing nations is a whole other ball game, but I believe you should sort out your own back yard first and all that.