The first thing that came to my mind was that this would be a modified form a wage garnishing, but with employer contributions included.

Do you have plans to include lobbying as a budget item? Just searching around, it seems that "Make student-loan repayment pre-taxable" has been brought up in the US before.

I'm curious: Where would you expect to take your cut, and how? Would it be a flat fee per enrolled employee, or maybe a % of $ being contributed?

If something like this did become a reality, I would expect it to eventually be bought by a benefits-handling institution like Fidelity or CREF, something who already does tight interaction with corporate payroll platforms.