I don't have a lot to say about the Mature Australia Party. What little they have in the way of policy can be boiled down to 1) better pensions, 2) better health care for the elderly, 3) less government spending, and 4) an immigration policy rather reminiscent of some of the more xenophobic parties out there. As a party initially formed by a bunch of oldies concerned about conditions in quasi-retirement villages this may not be too surprising.
Some of their concerns suggest that they haven't quite kept up with the times. Their plan for pensions is that all pensions should be tied to pensions for politicians. Now since 2004, all new members of parliament don't get a fixed pension, they get a contribution to their super plan, just like everyone else. There's still a lot of parliamentarians under previous schemes from before super was a thing who will get pensions, but the changes have already been made. This is something I found out through a simple Google search. Again, this is a party of oldies.