TragicMonkey
Poisoned Waffles
According to the linked article, that's not how Sanders is playing it. His proposal is to pay for the program not out of the income tax dividends from the program, but from new taxes which will be placed on financial transactions. You can see the context he provides in the unveiling of the proposal. This is as much about sticking it to Wall Street as it is about fixing college tuition debt. Probably more so.
Raise taxes on Wall Street. Fight the pushback and attract young voters by saying it's to make college free. Everybody believes in free college! Only a monster would question taxing Wall Street to make college free! Etc.
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Besides, if it's an investment for the state to pay for college degrees, then it's an investment for the student as well, and suddenly their student loan debt isn't a problem the state needs to solve after all. The students will solve it on their own, by getting their degree, paying off the loan, pocketing the profits, and enjoying their improved quality of life. The state still gets the same income tax windfall, even - and they don't have to raise a single cent of new taxes to do it!
The problem is that a college degree isn't always a good investment, especially at current prices. If the idea is to realize a tax windfall from secondary education, then the smart approach would be to first try to reduce costs, and second try to take on those costs only for degree programs which actually have a high chance of profitability. A program that subsidizes qualifying (meaning demonstrated cost-effective) STEM degrees, for example, would make the kind of sense you propose.
Just blindly paying for everybody's college, and raising new taxes on some other sector of the economy entirely to pay for it, makes no sense at all for your proposal.
I was offering a broad view, not outlining a plan or explaining whatever Sanders thinks he's proposing. As far as "where the money comes from" I don't earmark income in that fashion; money flows in from multiple sources, it flows out to multiple destinations. So long as the former total exceeds the latter total I don't think it matters.
And I do agree that if the nation is thus investing in its population's education that guidelines should be set and metrics established. Only accredited schools, only degrees that are actually viable, only fields the nation could benefit from at the projected time of graduation. Costs of the education negotiated and controlled. And perhaps to maximize the chances of success some sort of program to ease job placement.
No spending $200k for an English major to flip burgers, or swell the ranks of underemployed law graduates. But perhaps a boost in technology so we need to import fewer foreign experts would be good.
But of course doing such things would be government overreach because the government should properly do nothing, even if by so doing it makes America great again, right? The last thing we need is a well-educated, well-paid population with good jobs and vital skills to boost our national economy, strengthen our defense, and raise the standard of living!