It doesn't even exist unless property is getting cheaper relative to wages, not by it increasing due to the cheap credit rocket fuel that was poured everywhere 1997-2007
I think that the 'property ladder' is more often talked about when property prices are outstripping wages. It still exists though, and paradoxically, the best time for a first time buyer to buy is when other people aren't, which ought to mean prices go lower. Since the collapse of the property market in 2007, property prices have perhaps not adjusted as sharply downwards as I had hoped, but they have dropped below the curve of historic house price inflation. It's possible that the long term curve may be an illusion, or that a big downward correction is still to come. Nevertheless, I reckon that prices would have to fall by perhaps more than 5% per year to make it worth waiting before buying if you can get a mortgage on a property equivalent in value to what you can afford to rent.
The thing people sometimes forget when comparing renting with owning your home, is that once you have paid off the mortgage, you can live mortgage/rent free for the rest of your life.