They probably only need just TWO employees, a CEO to get the money, and a secretary to collect it.
Every single action Microsoft makes is met with incessant criticism. This makes a lot of sense as for two decades the Microsoft marketing machine has firmly established this universal notion that anything different than Windows is scary, different, and OMG, *incompatible*. That worked very so well as no Windows user wants anything different than what they have right now.
So, all Microsoft should do is just keep printing copies of Windows XP, since that what everyone wants, and just keep collecting the money. Users would be a LOT happier as they would never have to worry about any change, and the CEO would be happy as he can just keep collecting the money with no effort.