Uhm... if you actually meant that people studying whatever they decide to study to any degree should earn a decent income that make them independent, then I agree that this is a better alternative to #UBI.
But note: the income should be granted to anyone studying whatever they are interested into, not to people studying "what the market need".
If that's what you meant, I'm sorry for misunderstanding your words (but I also suggest you to be more clear next time: "job training" is a very specific kind education, designed to only teach people how to perform a specific job, not for example how to run a company that could compete in the market or create innovative technologies).
Yet the "who pays?" issue persist: you know that such "Universal Culture & Income" would have a huge economical cost: how do you think it could be payed through taxation?