Already done. Education is considered a public good. That is why K-12 education is paid for in the US. As far as a higher degree, the landscapers working across the street probably would not benefit from getting a degree and I do not see how the public would benefit from paying for a degree for those guys either. There are a significant number of jobs out there that would not benefit from people getting a degree. There are perhaps classes that might help in regards to those jobs but a degree is not something that would help. Also, the classes that would help are generally provided exceptionally reasonably priced at community colleges.
The degree might not matter for certain types of jobs, but the additional education could still enrich people’s lives — and a more educated populace could make for a better society in general.