This is pretty well researched and therefore quite depressing when you think about it.
Myki has cost about 1.5 billion australian dollars. That’s 15 with 8 zeros after it, otherwise defined as:
The article lists things which are cheaper than Myki, including the space shuttle launch, Curiosity rover, currently on Mars, and the entire assets of the Victoria Police.
The decision of government in this instance, to throw good money after bad logically has to stop somewhere.