You just don't enter private thoughts into such systems. The line is pretty clear. The only problem is that if you want to WfH, it becomes nearly mandatory to establish side-channels for unofficial, non-company discussion between co-workers to replace neutral spaces in the office like the break room or cafeteria.
Break room and cafeterias can be bugged, company phones and email addresses can be bugged or monitored. With externally controlled neural implants I'm not sure if there is any means of avoidance, the majority of the human race may simply end up as slaves, to provide extra brain matter and creative visual processing cores to a corporate computer network.
I would be surprised if break rooms or cafeterias could be legally bugged without displaying a prominent notice where I live.
That said, I totally agree about company phones and email addresses - those are under employer control and so could never be trusted, which is why the side-channel would be something like an unofficial WhatsApp group of a few co-workers who know each other well. Brain implants are not part of the threat model just yet, and I was sharing my observations purely in the context of my own recent experience.
I think the only long term solution is to establish or work for a cooperative which does not patent ideas or which only patents ideas defensively to protect the free use of ideas for its members, to establish public banks, to levy distributive taxes on private land and natural resource holders.
