Why is anyone surprised by this? Bribing lawmakers to vote for a bill has been going on in both parties for decades, maybe from the beginning -- it's exactly why some Presidents have pushed for a line item veto, and why honest legislatures have tried to ban bill add-ons that don't relate to the actual bill.
http://www.breitbart.tv/democrats-try-to-explain-300-million-dollar-bribe-in-health-care-bill/