Wait a minute, you state something that Chomsky never said (the "alternative 100% top-down central-managed solution") , and then call him "not very useful" for this fake statement? He's not saying Mondragon is bad, just that within capitalism, these solutions are still fucked on the long term.

If you really want to judge him on his real-world solutions, then take at look at Michael Albert's Participatory economics that he's been supporting for a while : https://en.wikipedia.org/wiki/Participatory_economics

But according to me, what Chomsky lacks in his analysis is some hegelian stuff, so I'd recommend to go further and dig some Slavoj Zizek and Deleuze and so on..