Home Sale Price Underquoting

This post is prompted by an article in Sydney Morning Herald:
Underquoting on Sydney property markets is the cause of endless frustration to buyers.  Some agents admit buyers are being misled, but the NSW Department of Fair Trading said there is no evidence of this being a problem.  Their spokesman says "The Department had received only a very small number of complaints during the past three years." 
Maybe that is because the Department's responses are so anaemic.  A complaint about gross underquoting on a property in Allerton Road, where 69 bids were made, starting at the "buyer's guide" price and initially going up in $25,000 jumps to nearly 30% above the advertised buyer's guide price.  The department replied that "the agent was working in the best interest of the client" and took no action.  That agency continues to mislead buyers.
The Queensland government is proposing to ban all advertised price guides, and another proposal is to make vendors publish the reserve price a week before auction.
Ray White Beecroft's policy is to give vendors and buyers a list of comparable properties, with prices, so the parties can make their own minds up based on verifiable fact.  Agents are required by law to give these comparables to vendors, why not make the pack available to prospective buyers?