Naturally the ultimate motive is for people to hand over their wealth and liberty, that's a given. I just have to pretend to be credulous for a moment and ask what, exactly, they propose be done in the span of 500 days to "avoid climate chaos".
Are we to shut down all the world's power plants? Get all the cars off the roads and planes out of the sky? Shut down all the world's factories? That's the thing, it's asinine on its face, this idea of a 500 day warning. Even if it were a certainty that we had 500 days to avoid climate chaos, there's literally nothing that could be done to stop it.
I am actually amused that they continue these over the top, alarmist panics. IMO their tone deafness on this is a big part of why they've been unable to sell their grand scheme despite the unending repetition. People seem to just intuitively know it's a fraud.