It's politically risky to raise taxes. It's politically risky to cut spending. The one thing that isn't politically risky to do is go deeper and deeper into debt. Whatever agreement evolves or devolves out of congress it will likely allow Republicans to satisfy their base by cutting spending a little, allow Democrats to satisfy their base by raising taxes a little, and kick the ball down the road by going deeper into debt.
The real subject of this is not Medicare or the Stimulus plan-- it's long term thinking.