Major UK banks hit by payday digital banking problems again

The traction I'm looking for is discussion of this issue by technically knowledgeable people. Something is happening here which potentially affects the majority of the population of the UK, and the tech community by and large seem to be ignoring it.

Banking is critical national infrastructure. If online banking were to stop working for any considereable time, the result would be economic chaos, and right now the online banking services of most of the major banks are going down regularly, and concurrently, to the point where the mainstream media are reporting it.

Outages like this should be incredibly rare, and certainly not both frequent and concurrent across the big-nine banks.

It's all happening in plain sight, but outside of some trade press reports, no-one seems to be discussing it within the tech community. DDoS? Nation-state level hacking? Wide-area data centre or telecoms network failures? Repeated failure of some unacknowledged single point of failure? Or something else?

It's clear that even the Treasury Committee don't know, or they wouldn't be sending these letters to the banks' management.

Whatever it is, the banks seem to be keeping it a secret, and security-through-obscurity is generally a very bad idea. I understand keeping problems secret for short periods to allow fixes, but this has now been going on for months. Something is very wrong.