Going against the grain here but I do think NT kids should be making serious plans to be independent not having f/t jobs and still living off their parents.
Adult children who are sill living with their parents aren't doing it out of malice or sponging, they're doing so because they can't afford to move out.
And if you want your adult children to live with you forever, just use this calculator! They'll be paying you 80%+ of their take-home pay and will never be able to save enough to even put down the deposit on a rented flat! You can look the other way as they pay off your mortgage, then you can blame their predicament on buying avocado toast.