I heard someone say they knew someone on a working holiday. I thought wow, that is an oxymoron. Truthfully it is, but also it's a very clever idea employed by some countries. A cut and paste from wikipedia is below.

It allows young people to experience living in a foreign country, without undergoing the usual costly expenses of finding work sponsorship in advance, or going on expensive university exchange programmes.

When I read this, I thought...hmm you let young people come into your country and spend sometime there. They spend money which helps the economy. The like it and go through the official channels to stay. Which is a plus, you now have a non-citizen acting a citizen. If they don't like they leave. If they act up it you deport them. Hmm, this is sounding like a real win for the country using this program.