I know exactly want I am talking about. What happened to Optus happens to me all the time when developing custom software for Australian businesses. Sys-admin is all outsourced to a huge Indian conglomerates who have no clear idea about the scope of the network and no incentive to know it. Consistently claim a ticket is completed when it has not been and repeat 5-6 times before they blame the software, repeat until I have a full Phd thesis of evidence demonstrating it is a sys-admin issue.
In the end it is all security theater because I write the software and could screw up the whole business if I wanted to be malicious.
Exactly. Hence I started with the trillion dollar mistake comment, it costs a truck load of money to get any changes for development with no security benefit in this context. I could feed businesses bad data and no network dictatorship can stop that.