Originally Posted by
zlefin
No, I don't think that makes any sense. Planes are expensive compared to individual humans. Wizards are not inherently so expensive compared to humans. A low level wizards, especially level 1, isn't that expensive at all really. Also note that modern planes have tended toward higher tech and greater cost; the plane to serviceman ratio may have been different in earlier eras.
A better point of comparison for arcane casters would be the heavier equipped modern infantry; ie the ones that have mortars, bazookas, anti-X missiles. Also the field artillery.