Australia has a long history in immigration because after the war many people were given cheap or free tickets. Now that the economy is slowing down the government is reducing the amount of people being allowed into the country. The government believe that the less people they let into the country the more jobs there are for people already here.
In the past Australia was letting a lot of people into the country to build the population. Back then anyone could come to Australia but now a preference is being made for skilled migrants. There are three main types of migrants that come to Australia, some already have family in Australia, others are refugees that are escaping from trouble in their old country, the rest are usually skilled migrants who come to Australia to work.
I believe that migrants should be let into the country because some of them buy houses which gives builders more work. Others dont buy houses but start new businesses that employ more workers. They will earn more money and then buy more things from stores who can then pay their workers who can then buy more things and so on. This cycle is made and everyone ends up with some money.