Thanks Genghis.
Point taken that heavier aircraft have lower manoeuvre limit load factors. However, the rule still allows pilots of lighter aircraft to pull the wings off more easily. It is as if pilots are assumed to be more aggressive when at the controls of heavier aircraft!
PFTS: Are you referring to stick force per knot from trim? If so, I find it equally surprising that Mil 8785C appears to be silent on the matter.