The French had no other means of achieving their objectives in 1789. They didn't have a democracy. They didn't have the ability to eliminate their "billionaires" by taking their billions. They could only get rid of their "billionaires" by taking their heads.
Unlike the French Revolutionaries, we have the framework of a functioning democracy already established. It's currently broken and non-functional, but it exists.
We don't need the guillotine, but we do need the mindset, the attitude, the commitment that the revolutionaries had when they decided to use the only tool they had available to them.
Just tell them you're contagious, and don't want to pass it on to them.