Two things. First, this isn't the same thing; you're talking about embedding a resource in a company to read out real time telemetry from internal systems (information with a short shelf life), not stealing industrial trade secrets (information with a very long shelf life). Second, I can assure you that, even with our imperfect systems, there is actually a set of checks and balances in place to prevent rampant (note I said rampant) abuse of this kind.

Yes, agencies would be very excited for this sort of capability. Do they get it as a matter of course that easily? No. There are layers of accountability, legal authorities, and (warranted) push back from commercial entities.