Well, the end game, I believe, is to do away with all the tradies and allow anybody to do anything. Some say the sooner the better. The idea then is to have a inspector for each service visit regularly for a fee.
There's a middle way, certify anyone doing it for hire and leave citizens free. Everything after the main fuse is between me and my insurer and my insurer isn't sending any inspectors. Here, the end game is "some people will die and that's okay".
That is almost the other extreme, but leaves some people at a significant exposure: renters and public/commercial locations. I have seen some "shockers" clearly done by DIYers. If someone buys a house they can choose if they want an inspection or not, but the cost and time required to check that is disproportionate to a 1 year rental contract (default rental term here). Workplaces are supposed to provide a safe environment, but too often they don't, my house is safer than my workplace but what should be the minimum level of safety acceptable?
Australian situation at the moment: all tradespeople are supposed to be responsible for their work being up to applicable standard, but the only people able to assess that are their own colleagues (its somewhat a racket/protectionism, and rarely do tradespeople have complaints upheld or lose their registration). Its a logical system as many of the things that need to be inspected are hidden in the process (plumbing in particular) so after the fact inspection as Ed.Kloonk suggests is stupid, as it would require installations to be designed specifically for inspection. Even routine electrical "test and tag" plus checking earth continuity in residential installations would be barely functional when you look at the mindless zombies in those industries. Same issue as the tradespeople at the moment, they can do completely inadequate work and if you question them on it the onus is on you to prove the problem. When you do prove the problem was with their substandard work they begrudgingly fix it up and go onto their next
sucker client.
The problem is fixing the racket of "trained" people who aren't held to account, opening the standards would be one less roadblock in that.
Even with all the "assurances" of the current Australian system myself and others always get an electrical compliance check done when buying a new property. Just for our own safety, with a tradesperson we trust.