You've had the downvotes, but no one has taken you up on your points.
A "liveable" wage has no defined meaning as far as I'm aware.
But then you launch into "living wage". And that has.
It's an income from employment that allows an individual to meet their needs in terms of housing, food, clothing, travel etc ( Internet access is a recent addition, but COVID has highlighted it) and a reasonable opportunity to take part in society through leisure and cultural activities- e.g. a TV, school trips for the kids, even the odd meal out.