If you're referring to AS/NZS 3000, there's nothing against wiring the circuits in twin with a separately run earth wire to each point.
No I'm not actually, before the AS/NZS thing and still, we have our own Regulations here, have you read them?.
The fact that local Regulations are being watered down in favour of a "one size fits all"
across countries, is just one of the reasons I'm happy with leaving this industry.
AS/NZS 3000 is nothing more than a compromise, from both sides.
Let's face it, these days if you're not young, you're old - Red Green