The base is everything
Pavers are only ever as good as what they sit on, and this is where jobs succeed or fail. For most paths and patios the crew excavates, lays and compacts a road-base sub-layer, then a bedding layer that the pavers sit in. The whole build is set to falls so water runs away from the house rather than pooling, which matters in Ballarat because standing water freezes in winter and works away at any surface.
On reactive clay the base has to be properly built and drained so the pavers are not riding directly on ground that swells and shrinks, and edge restraints hold the whole area together so pavers do not creep and open up gaps over time. Skip the base prep and pavers rock, sink and lift within a year, no matter how good the pavers themselves are.