NBN fixed wireless

What is the cost per km for fibre delivered and installed anyway?

I had in mind the sheep station that is 200 km from anything. The incremental cost of servicing that property with optical fibre is high. The property itself would very likely not be willing to pay it. It is arguable that it is an unreasonable burden on the taxpayer.

The incremental cost for satellite is much less I expect (tech has to do minimum 400 km round trip, supply and install modem and dish).

That is what I meant by a certain amount of non-uniformity (inequality) is unavoidable.

That doesn’t mean that you can’t set a basic minimum standard bandwidth that everyone can get. It just won’t be 1 Gbit/sec.