Okay mr expert you tell us all how it should be done
Just so you know, the purpose of physical security in any setting, banks, military installations etc. is not to prevent the bad guys from entering by itself. No physical security can do that. It's purpose is to slow down the attempted breach long enough for human intervention. If you think the wall is going to work with out the BP guarding it then you have no clue how security works. Faulting the wall because it is possible to breach it is stupid. Every wall can be breached given enough time and the right tools/materials. The question is how long will it take to get through/over it and how well will it be surveilled.