Where are these abundant resources, in the US or Canada? Non-existent, that's where.
It is absolutely a "feature" of capitalist systems that "economically non-contributing" citizens cannot be supported indefinitely. That goes for every one of us that isn't a cop or firefighter with a huge pension, or didn't get lucky in our 401(k).
I know that the Jacobin is a "Marxist" magazine. But the world has repeatedly tried Marxism, and that didn't go well either.
I don't claim to have an answer. But neither do they. This article is just pointless negativity.