The systems definitely have a method to communicate for payments, they should add a button to report issues with charger. Of course it's ripe for the button being pressed randomly, but I'm sure there's a smart person that can automate the messages received to catch that. But at least it would provide a possible mechanism to have frustrated users report these unattended units
It is more of installers/maintainers not interested in fixing the chargers. They would already have information about how much is being payed for each charger and from that would know some charger is broken.
I'm sure the installers/maintainers are not the blame here though. Of course they'd like to get paid for doing it. It's the owners of the equipment that don't want to pay for the maintenance. Let's place the blame at the appropriate feet here.
There's really no reason 95% of issues couldn't be caught through self diagnostics. The easiest thing for the button press is to rely on repeated presses at longer intervals, like 3 presses with at least 15 minutes between the first and last within a 2 hour window.
