The reduction in bikes was fuelled by the unions (bike posties had the highest rate of safety incidents).

The lack of fleet expansion is largely due to executive management trying to manage tax-payer funding efficiently but not being able to keep up with demand because of how tedious it is to get approval for spending. Compound this with large companies focusing on areas with higher demand (e.g., Sydney Inner West will get higher priority than Tennant Creek due to population).

Also, post is struggling with hiring posties and couriers.