When government is spending taxpayers' money it doesn't care about efficiency, only about getting a slice of the pie. Family members, business partners and overcharging contractors feast on these multibillion dollar projects, and only them.
We've seen this happen with "Building the edu revolution", house insulation and so on. Porting bloody e-tax to Mac cost them $5.2 million.
The smaller the spending on NBN the smaller the waste.
Govt should focus on reducing friction for business, eliminating monopolies and building a healthy economy.
Competition and market forces can take care of the fiber just fine. If we had those.