You make a good point except for two points.
First and unfortunate, the vast majority of the deficit problem our country faces are programs like Medicare and Social Security. That isn't the fault of the wealthy or libertarians. Unfortunately, in order to fix it, the lower and middle class with have to bear the burden...there is no other way. There are no amount of taxes you can raise that will bring us in the black.
There's some truth to that - not as much as you think, but some.
A question, though, is are these cuts made as we move to a plutocracy - or do we make them as part of returning to a more balanced society?
I can support some of the cuts - when made in the right overall plan, but not when made simply as a step towards preserving the staggering concentration of wealth, as part of moving to a return to the days of a few who are obscenely wealth while impoverishing most.
Right now, we do not have the political orientation to make these cuts the right way.
Remember the radical right has a plan - recognizing they can't get people to vote to cut their own benefits easily, they have the 'strangle' strategy to have spending and deficits get so out of control as to force massive cutbacks that ultimately work out to the benefit of the ultra wealthy, just as the great depression made many of the most rich people far richer, able to buy up resources very cheaply.
Second,
"OK, let's say we cut Medicare and Social Security and the military by 25%, against the will of 90% of Americans."
This is a misnomer because it implies defiance. We live in a republic. There is no legal mandate that congress has to regard the "will of the people" in any way. I would prefer none of these programs be cut, but at the end of the day something must be done or the entire nation will be jeopardized by a crushing deficit that has been hounding us for decades. Its like trying to pay a maxed out credit card with recurring overdraft charges, yet the CC company keeps letting us run up more bills. Gotta stop spending money before you can even begin to pay down the debt.
The thing you seem to be missing is that it's a political problem that the best spending of the government is the first to be cut, and the rich are the most protected.
We do have major fiscal issues - but we need to solve them not by cutting the wrong things, but the right things.
Otherwise, you are just further entrenching a huge gap in wealth and power. With this election we took a huge step the wrong direction.
Did you catch Rand Paul's victory speech explaining that everyone has to do what's best for the rich, because everyone is dependent on them?