Not too many years ago I had a parcel sent from the USA by USPS, insured and tracked and "guaranteed" to be delivered in 10 business days. The USA side tracking was brilliant as I could trace it across the USA and into the departing cargo plane. Then it went missing. After a month the sender was able to lodge a lost package trace. Auspost actually contacted me to see if I had the lost package. ROTFLMAO.
Not a single tracking entry in the next 3 months, but it was eventually delivered with nary a mark on the package, and not a single extra postal stamp to show where it had passed through, and definitely no admission it was atypical or unreasonable that it took over 3 months, could not be found in a trace, had not been tracked after leaving the USA, and was eventually delivered. Auspost focused on "delivered" as all that mattered, not reviewing why their part of the system apparently failed.
This is what we get for our $4.8 million CEO. Imagine how bad it could be if we did not have someone so deserving of such a high salary in charge