Myki on busses

On buses, it will be made possible to buy and top up a myki card, and bus drivers will be urged to take a tougher line on passengers who do not touch on. Buses have already been installed with myki equipment in preparation for the change.

Fare evasion blitz on trams, buses

So, wait. It’s going to be possible to buy a Myki on a bus but not a tram? What moron came up with that winner of an idea?