How do we implement systemic change?

With a shovel?

It starts with intolerance of the status quo.
Adults have a responsibility to know and do stuff about capitalism.

first we have to get waaay smarter about the system and subsystems and how they interact and how all that goes right or wrong.... and then we know what we're dealing with

and why we should wanna change what...regarding this nebulous thing called "sysyem"

but I know what you're driving at

It's impractical. Everyone has to be accountable to make it happen, but that's too much to ask in today's world. Everyone seems lost and they want leaders to follow who have the same old agendas and there's no end to the chaos.

Eat our greens