Well, you don't even have to have a criminal record......just be an associate of a criminal network (or whatever they're calling it).
Great example from the Govt mouthpiece on the radio went along the lines of "Would you want a member of the hells angels working on your safety switch? We'll let the public decide."
Funnily enough, I spent the first 6 months of my time as an apprentice sparky (in QLD) working with a dude who got of an attempted murder charge a few years earlier on a technicality. He absolutely 100% was guilty but was lucky. I worked with plenty of fuckwits over the years who's weekend would consist of on Friday night, going to the pub, getting pissed then belting *****, and on Saturday, repeat, only with extended piss drinking beforehand. Worked with drug dealers, drug users. ****, at certain stages of my life you wouldn't have wanted me in your house under any circumstances.
But because someone who has no criminal record but chooses to hang out with people who may be fuckwits (and themselves are probably a ******* due to the fuckwitish rules that go along with joining these things) means you'll take their license of them because the public don't want them working in their house? Crazy.