This approach is largely crap! If you want to live in a risk free environment then perhaps a goldfish bowl would be suitable.
The average plumber/electrician/builder is largely trained by experience, what he/her got wrong, like the rest of us. The prospect of being sued does not apply to the average cowboy builder, he has no assets, and only people with assets get sued! The experiences of most of us are that the chance of getting a GOOD job done by a supplier is at best a 1 in 4 possibility. Yes, the average plumber learns a bit more every year, but very few ever go on a manufacturers training course, most operate by reading the instructions, throwing them away and doing it like the last one. Electrical wiring is a very interesting area. The IEE regulations are a GUIDE to good practice and not mandatory. They can't be, as the paperwork required to cover every eventuality would dwarf even the treasury's manual on taxation. I have seen the test specification of a modern defence system equivalent in complexity to a consumer PC, reach 600 pages of A4( largely unnecessary), imagine the test specification for a flat in a block!
If people wish to live in the nanny state, then they are welcome to do so, but IMO the effects are going to be a continuous degradation of living standards over the next 20 or so years. All businesses fail when the overhead costs exceed the capacity/willingness of the customer to pay for them and further increases in regulation will simply lead to people ignoring them even more than they do at present. We want much less regulation, and greater willingness to accept risk if we want a viable future.
Regards Capitol