How the gov can help with student debt repayment

Not all graduates whose education costs $30,000 or more a year will land high-paying jobs and fully repay the student loans fast and get out of debt. I see two ways of creating a system of debt-free graduates. The government fully repays the loan upon graduation if the starting salary is below a certain range and adjusts income tax a little higher for the individual in that income bracket. Or the government doesn't repay the loan but doesn't collect taxes either until the loan is fully repaid.

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