Following the example of The Guardian, Stuff has launched a crowdsourcing app for Ministerial expenses. Start here, click to get a random Minister's file, page back and forth within it (or just download the whole thing), then when you're done, mark it as not interesting or worthy of further investigation.
(Note: if you're not sure what's allowable or not, check out schedule 2 of the Travel, Accommodation, Attendance, and Communication Services Available to Members of the Executive).
Almost all of the receipts will be utterly banal - Ministers eating and staying in hotels when they are travelling. But there might still be some stuff that hasn't turned up yet. We won't know until we've looked, so go wild.