A Fix a popcap exploit?

Right now, both the soviet Heavy mortar and the Ostheer LeIG consume 6 pop each, once their crew die, you can recrew them lowering their pop to a half using this exploit, since the pop cost come from the crew (2 each) and not from the gun, to fix this I suggest adding population to the gun instead (like the Nebelwerfer), I guess that this is possible for the LeIg (looks "similar" to the Nebelwerfer), but would it be doable for the Heavy mortar?

Yeah, its possible for the heavy mortar as well

Ok, then I will change the population cost, crew = 1, gun = 3 so in total is 6.