... the supposedly lowered productivity of those people will have no real effect on the real world. It's not like this affects any of the parts of Sony that actually do something... like building electronics.
Those are the parts of Sony we could probably live without, the parts which manage licensing rights, the parts that do marketing and advertisements.
Other than that, I don't believe Sony's IT department has done more things wrong than any other IT department of your typical mega corporation. It's hard to secure Windows desktops, the logical solution, switching to a few big application servers which get reset to a known good image every night is not wanted by some people.