If it gave a bonus to all 3 (Social, Ship, All), wouldn't it be giving extra to social and ship (because you'd get the bonus to social AND the bonus to all, or a bonus to ship AND the bonus to all).
Would seem to make sense to just give a bonus to all, 'cuz then it'd just give one and it'd apply to social, to ship OR to "all" manufacturing improvements like the factory.
I agree not giving it to all, leaving "all manufacturing" improvements like Factory seems kinda nonsensical.