Why would one have to hire a whole new cadre of technical talent? Wouldn't it just be taking existing talent and/or ops teams and having them work with the autoscaling APIs as opposed to working with the data center teams. If the skillsets don't match then you can either train existing talent or, yes, hire new folks.

I agree the occasional phone call removed from your workflow isn't reason enough to justify a giant cloud migration... but it is one of many reasons.