Good, now try that against a player with working brain instead of easy AI and see how far you get.
Still, it is an exploit that needs fixing either way, don't you agree?
Btw yesterday I had a 3v3 team game where in the end I was popcapped as OKW for ages and was floating like 4000 manpower, 500 fuel and 500 munition or even more. Still the game went on for a while still because just moving into the enemy army which was not that small either could still go badly. If I could exploit such a thing as OKW I could have had 3 King Tigers with those ressources instead of just one.
Maybe such games are not common and maybe the game was not on a high skill level, but either way such things should just not be possible in any way.