I'm quite sure in large data centres there are always trying to cut electricity costs, they have teams and such like to look after such things.
In small (as in 1 -> 10 ) companies they don't have much anyway so it makes little difference.
In small medium (11 -> 200) the IT teams normally already have to do everything that isn't particular to another department.
Server operations, desktop support, application installs, database management, telephone system management, reporting management, projects, maintenance, backup operation, new builds, troubleshooting, management reporting, new projects, specifics, costings, renewals, license management, intranet, environment management and maintenance, sans, storage, networks, firewalls, routers, aircon, and building security systems. All the time trying to keep the balance between performance, cost, life and scalability. All with limited physical space and manpower. O and you occasionaly have to change a light bulb or a bit of building maintenance.
Where the hell you supposed to squeeze micromanaging electricity consumption? Not encluding the adding of bulk loads of power monitoring kit.
I wouldn't mention this too close to government types though or you'll see a new tax in not time "O not monitoring your IT power? That'll be £50 per head per month. Thanks guys!"