How powerful is the IPA?

They've been called the faceless men of the right; the Institute of Public Affairs, or IPA, a Melbourne based think tank which enjoys what some feel is a large amount of political influence.

Before the recent election, the IPA issued a wish list of policies it would like to see implemented and many of the items match the Abbott government's own. So who is the IPA and how much political clout does it have?

Phillip Adams - Late Night Live - ABC Radio Nationl