That's actually a separate issue. By his stance, he's advocating for some kind of continued federal subsidy, yet he wants those distributing it to have less information than they have now.
That is the equivalent of looking at the situation and while stating you (DE) are against the way the federal government does it, for whatever reason, you think them having no function but to assign x dollar amount per person is an improvement.
Look at it further. Doing this address none of the concerns that most people have regarding this issue. You brought up the idea of amendment-his suggestion goes against that. It suggests a blind federal agency handing out taxpayer dollars, but with no control other than population. Most likely, some hokey bill by congress would set the amount, and it would become the future favorite of democrats and republicans alike. A proxy war that would do nothing to become part of the constitution.
It also doesn't address any of the concerns of those who would like to see the education system revamped. Finally, it ignores those would like to see the Department of Education go away entirely.
His is simply a stupid suggestion: that we just hand out money based on census data.
His suggestion is completely different than yours. It is 'lets just dumb it down'.