Airservices Australia ADS-B program - another Seasprite Fiasco?

[Howabout]

OK, I don't know much about this and I am definitely not a technophobe, but in trying to learn something, I lifted the following from the US NPRM on ADS-B:

Presently, GPS augmented by the Wide Area Augmentation System (WAAS) is the only navigation position service that
provides the level of accuracy and integrity (NIC, NACp, and NACv) to enable ADS–B Out to be used for NAS based surveillance operations with sufficient availability

Now, I may have taken that out of context; I genuinely don't know, but it seems that there is a reliance on WAAS in the US for 'accuracy and integrity', which we don't have.

Can someone please explain how we propose introducing ADS-B without augmentation when the FAA appears to regard it as mandatory.