Except then your top cards (Minion, etc.) just get discarded by the minions. So it doesn't really have much of any use.
Forge is right, but I think he stated it somewhat confusingly. So how it works is:
Player 1: I play Scheme!
Player 1: I play Scheme again!
Player 1: I play Scheme again!!
Player 1: I play three Minions!
Player 1: I put my three Minions on the top of my deck and then draw them!
Player 2: I play a Minion, you discard your whole hand (those three Minions). Sucker.