I would agree with everyone above, that they already have, and know who and what can be outsourced—but know that some of it cannot—as some of the employees really do need complete access to the place of business.
It seems to me that most outsourcing involves customer service, vending, and maybe expertise with the systems of the company itself. None of these, including Customer Service, can be performed well without a thorough understanding of the language, inferrances, idioms of the company culture and the culture of the clientele
I stopped using Cellular South (now C-Spire or Cease-Fire or something) because I could not get an English-speaker on line whom I could understand or could understand what my problem or situation was. Occasionally I would get someone who understood. but there were still definite communication problems.
Problems cannot be resolved when there are communication hindrances.