In the current context, the government is spending $X for education. We can say $X = $X_students + $X_schools + $X_lenders, where the subscripted variables represent the portion of the benefit each of the groups captures.
I don't necessarily want to change the level of $X. I just want to raise $X_students at the expense of the other two.
I don't necessarily want to change the level of $X. I just want to raise $X_students at the expense of the other two.