Medicare cuts in Reid's Senate bill? Have the Democrats gone mad?

The following has been said by other commentators, but I have to add my voice to the chorus: This is insanity, Democratic leaders. Why are you doing this?

Getting AARP’s support might give you cover among the Washington crowd, but let’s inject some common sense here. Lots of people are members of AARP, but that does not mean they are intensely committed to it, and will therefore follow its lead on such an important issue. AARP is not like the unions in that regard. Lots of people join to get discounts on auto insurance and movie tickets, meaning that affiliation with the organization is broader than it is deep…

Why are Obama, Pelosi, and Reid doing this? How could they be so foolish as to repeat the most egregious mistake of the Republicans of the 104th Congress? Why are they forcing their vulnerable members to vote on a bill that would cut Medicare in this fashion? Do they dislike their moderate colleagues? Do they find the chore of being the majority party too burdensome? Have they simply gone mad?