I'll posit a very non-tech reason why they may be getting enormous bills without any productivity gains (based on what a corporate person told me on how they use AI - so anecdotal).
What people are doing is making AI do dumb tasks to mask away their laziness or sound more professional. Like everyone using AI to reply to emails/messages to get the 'right' corporate tone in replies. Now imagine 10k employees all sending AI emails & replies...
Basically waste 