people need to learn what is the meaning of OP and broken,
it literally breaks the pop cap. and the max is not 120/100 thats just an example. you can basically have an army of like AT guns mgs and rifles to around 60-70 pop cap hold out,and then use your captain(or doctrine) to create many tanks in rapid succession,while decrewing and recrewing.
"Limit" could be 180/100 for all we know. and that is literally breaking the game.
And the problem isnt being over the cap..you can just go right back down(and relieve manpower income) until the crews themselves put you over the cap too far,which is the only real con to doing this.(SINCE IF YOU GET ATTACKED YOU CAN JUST HOP IN ALL THE TANKS and retaliate.)
This is some hidden 'Merican industry commander.