Before you can build the new system you must first destroy the old system.
Yes. They simply don’t give a rat’s ass.
The lower Leftist echelons don’t really care, they think they will have theirs (and that the wealth will go on forever) and the upper Leftist echelons know full well what the end result will be, and look forward to it.
Our political class, most specifically (but not wholly confined to the Left) is a Kleptocracy populated by arrogant and unashamed grifters.
They undoubtedly feel that when it all goes down, they will have fully prepared their featherbeds to get through it.
For the lower Leftist echelons, they are all for socialistic and communistic ideologies for the simple reason that they think they will all be part of the “inner party”.
They are too bloody stupid and childish to understand that not everybody can be part of the “inner party” because then, the Ponzi Scheme won’t function.