The left is hamstrung in its efforts to appeal to a putative working class, which in the US was long ago engineered to a cloned rightist/racist mentality (in some cases!), a truly ugly disgrace.
But let us consider a different perspective: an elite revolutionary group pledged to fulfill egalitarian/socialist principles for all. They need not be democratically elected for the simple reason there is no democracy to be found. It is a rigged game. So in effect there is no real government and it is not anti-democratic for an elite vanguard to presume on a governmental void.
Consider the facts: K Street, big money, de facto no congress, no senate, a covert agency system out of control (assassinations, coup d’etats), a deep state using false flag ops (9/11…) to create a war on terror. The latter shows that the current so-called government is a criminal organization, and the response is not playing by the fake rules, but a revolutionary citizens arrest. Such a movement should have a populist aspect, but the real issue is to get the job done, with some failsafe measures to ensure this revolutionary squad doesn’t become a permanent new elite. It requires a very clear set of procedures and socialist/neo-communist principles, with a subsequent attempt to create democracy as if for the first time.
If we look closely, btw, we see it has always been this way, and this formation would rapidly generate its own populist wings. And there is a real working class out there, dispersed across the globe. A vanguard could better serve this situation which is too disorganzed to organize…