Revelation 22 is dealing with eternity - all of the saved will have access to the tree of life.

In regards to the servants in Matthew 25, all of mankind is responsible before God and will give account to Jesus when He returns. In the OT, all Israel was God's servant - and it is quite clear that not all Israel was saved.

Isaiah 42:18-20 Hear, ye deaf; and look, ye blind, that ye may see. Who is blind, but my servant? or deaf, as my messenger that I sent? who is blind as he that is perfect, and blind as the LORD'S servant? Seeing many things, but thou observest not; opening the ears, but he heareth not.

Isaiah 45:4 For Jacob my servant's sake, and Israel mine elect, I have even called thee by thy name: I have surnamed thee, though thou hast not known me.