Make the travel rules the same as for the public service.
@Jerry_Atrick while there is some truth in your post, it sounds like you were working for private companies. They can waste money however they like, or at least as much as the shareholders will put up with.
The government is a different beast. We can't choose to be "shareholders", our taxes pay for everything they do. A higher standard is expected and should be adhered to.
While no one is arguing that cabinet ministers should travel in economy, we should ask whether the benefits of the 6 minute speech outweigh the cost - ie should the last-minute fares have been purchased at all.
That trip aside, the overly generous family travel should be scrapped. Yes they have to spend a lot of time in Canberra, but any FIFO worker does the same thing and doesn't get their family flown out to visit them.
As for the sporting event tickets, and any other gifts from companies - this is something that wouldn't be acceptable in the APS and shouldn't be acceptable to politicians.
I'm not just picking on Wells here, there's a lot that spend more, on every side of politics. They should all remember that 99% of the people they represent get a lot less income than them.