Flash.....try this.
Read BOTH accounts ...not only Matthews account concerning the wise slave and the evil slave.
Jesus was teaching about an INDIVIDUAL attitude that each follower of his should have when he arrives. In Matthew, just before he mentions the "slaves", he talks about how each diciple should be like a man in his home that is PREPARED for a theif. If he isn't prepared...he gets robbed.
Likewise...if Jesus followers begin acting as the heathens, fighting, getting drunk, playing nasty with hookers and such, and not living their lifes like the Lord would wish, then he will judge them adversly.
There is no need to try and connect some group, or religion, or special message of Jesus concerning some mystical group that would appear in the end of time. Simply read the context...BOTH gospel accounts.....and simply ask yourself what message Jesus was trying to impart.
Gumby