Quality dental treatment is not inexpensive and the cost of porcelain veneers also reflects this.
Dental practices are essentially small hospital environments with stringent infection control protocols, extensive equipment and consumable materials needs, high staff ratios, and high insurance, licensing and compliance costs. Unlike a hospital, there is no medicare benefit paid to dental practices and all of these costs are passed on to the patient in the dental fees they pay.
Porcelain veneers are provided by the Dentist, but made by a Ceramist. This means there is an additional fee built into the cost of the veneers - and this is the Ceramist's fee. When veneers are made by a skilled, Australian Ceramist, the fee is significant, and this means that quality veneers will cost more than veneers made in overseas laboratories.
If you have received a cost estimate for porcelain veneers which seems low, or have been offered a discounted rate, then this might indicate that the veneers will be made in China or another low-cost overseas laboratory, where skill, quality and material properties are very low.