The teaching that Jesus was prophetically identifying a future "class" of individuls just doesn't cut it. If there really was a "class" of individuals operating at Jesus' behest from the time of Pentacost, why did C.T. Russell have to seperate from all religous organizations to revive Scriptural truths?
If the Watchtower's assertions are correct, that means that there would have been a Faithful Slave Class serving progressive spiritual food for some 1,800 years by the time Russell came on the scene. Yet, Russell was confident that truth did not exist anywhere in the so-called Christians arena; hence he started his own Bible study group.
The Watchtower has repeatedly insisted that no person can gain an accurate knowledge of the Bible without the guidance of the Faithful and Discreet Slave Class. If that is the case, then C.T. Russell was just another "apostate" who went off and formed his own group.
As Franz pointed out in his book In Search Of Christian Freedom; if the Faithful and Wise Servant is a "Class", then who is the "Class" of people who receive "many strokes" and the class of servants who receive a "few strokes"? Who is the "ten-mina class" and who is the "five-mina class"?
It's clear the Jesus' parbles were identifying types of individuals - those who are faithful, and those who are unfaithful.