Why did the scarecrow win an award at the Christmas party?

Because he was outstanding in his field of holiday cheer

Why did Santa get an assistant?

He was tired of claus-trophobia in his office.

Why did Santa's elves go on strike at the North Pole?

They wanted to clause their contract and improve their working conditions, but it was a gift-wrapped ultimatum.

Why did the Christmas tree go to the doctor?

It was feeling a little pine-ing for some attention!