Seems that a fix for that would be to attach a loan/bond to the training that gets repaid by cash or by credits for working at a member employer.
https://www.purdue.edu/dfa/types-of-aid/income-share-agreeme... (Income Share Agreements)
https://www.npr.org/sections/money/2019/03/29/708152566/epis... (Episode 903: A New Way To Pay For College)