If it is quite profitable to get a certain education, why would it need the tax payer to provide the loan for it? Shouldn't that be easy to fund from the private sector?

Student loans aren't your standard private sector loan though. They are a special legal category, which is why they can't be discharged in bankruptcy. All the usual borrowing standards don't apply either. No commercial lender would give that size of loan to an 18 year old with no collateral. The collateral is effectively a claim on the person's future earnings. What a crazy contract to have young people routinely pressured into.

I'm not convinced it's necessary but it sure as hell is nice. I got through undergrad with subsidized loans and it was nice to not worry about interest while I wasn't working yet.

The private sector does fund some loans but I think the current program just needs re-working. Forgiving all these loans is a no-go so this measure is a step in the right direction. I'd like them to lock down the interest rate to 2% + inflation next. The government does need to incentivize a certain degree of higher education for innovation.

I think the point is that it’s so beneficial to society for people to get these degrees that we should lower the barrier even further. I think you are right that having the private sector fund it is a good base state, I suspect you’d find that you can improve on that base by funding it with some public money. We’ve probably gone a little too far in that direction though.

Assuming you’re not talking about a loan to do this (at which point you’ve reinvented indentured servitude), back when there was a smaller pool of college graduates it was easier to find a company that would pay for your education, some even offering bonuses if you completed it.