Charity Strategy?

[Munchkin]

I wanted to get a clarification on charity since I think it really put me in a position to win the game last night. I was the lowest level so as players finished their turns I was getting all their excess cards. On top of that I was not getting monsters when I kicked down the door so I continued to stay in last place (and continued to get players excess cards). I would play as many cards as I could on my turn and then discard down to five. By the time I started getting monsters I was almost unstoppable because I had so much equipment and good cards in my hand. I know it's random if you get monsters when you kick down a door but if you decide not to look for trouble in order to maintain last place it seems like this could be a strategy to build up combat strength. Then by the time you begin to fight monsters you're in a much better position to progress quickly to level 9.