Christian Porter wants NZ-style welfare: here is what you get

When Social Services Minister Christian Porter exclusively told The Australian Financial Review that the Turnbull government was going to embark on a radical program of welfare reform, eye-rolling came easily. Cracking down on dole cheats and reducing the crime rate. Every government of every stripe wants to do it, the voting public loves it, and the Treasury coffers are claimed to be fuller for it. But for all the bludger-busting rhetoric, few western democratic governments are successful at paring back their long-term welfare dependency rates, or rate of spending.

What was different about Porter's plan is that it an "investment approach". The question is, what exactly is does that mean? What is an "investment approach", who does it and how does it work?