The Soviet Union has a "command economy". Industries and labor produced what the central agencies told them to, with very little feedback to adjust and no incentive at all to run R&D, QA, etc.
But what he's proposing isn't a command economy, it's a default economy. The government isn't telling Factory A to make widgets and it's not telling Person B to work as a basketweaver. Instead everyone gets some minimum amount of capital to use every month.
In fact it sounds more market-driven than what we have now with welfare and disability where, again, centrally-managed plans are laid out and imposed on employers and employees saying what requirements you have, what you can and can't use the money on, etc. And don't you dare get a job and start accidentally making too much money!
It might even be beneficial to employers looking for talented employees: If people are safe to shift around looking for jobs they should move away from poor managers and bad companies to good managers at good companies (and if you're a good manager you'd suddenly have a lot more talent to find the gems out of). This is one of the same resaons governments take such an interest in education, is to ensure a competitive workforce in relation to other nations in the global economy.
I'm sure there's more to work out with the proposal but I like the spirit of the idea.