As a big fan of Jean-Jacques myself I also dig the
volonté générale/will of the People, the trouble is that it's quite difficult to say what that "will" really is, first, and second, and just as important, who the People actually is.
To be honest I don't think that in these past ~250 years we've made that big of a progress in answering those two fundamental questions. I mean, the US Constitution starts with the very rousseau-ist "We the People of the United States", but a major part of the population living in said United States wasn't considered (fully) part of said People until the mid-19th century, some say that even now that process is an ongoing project.