A lot of service oriented things that a company outsources should be look at in an infrastructure model: You should judge your accountants, lawyers, IT support and phone support on how much you don't need them. If they put robust and easy to maintain solutions in place - they have done their job properly.

Examples: 

A good accountant will setup the systems to make sure that your payroll taxes are done on time. A bad accountant will help you clean up the mess when the state starts fining you.

A good attorney will setup a standard contract for you to keep you out of trouble and set expectations from the beginning. A bad attorney will be more than happy to hold your hand when the lawsuits start.

A good IT technician will make sure that you're backed up. A bad technician will help you salvage the files that are left when your computer crashes.

The true hallmark of a good practitioner of his are: You should not constantly see them and have to pay for them.

As your company grows, it's tempting for middle managers to look important by bringing on more and more support people under them. 

Beware! You need to give them clear direction that this is unacceptable.