That idea could really discourage people from robbing the bank every possible turn. But I think bank (and the future casino) should be actually harder to do.
Like, instead of nerfing that much the money that it awards, "make them fucking hard" like Solid once said. (dont take me wrong, a system like that is a must in my opinion, but I think you could nerf the cash less and make the heist itself more dangerous).
Right now, they are very easy to do if you are in a group of 8 crims. Get in, see that vault guard being shred to a pile of guts by gunfire, hack the vault, get a bag, run out, see the few cops that arrived be either gunned down, or not being able to catch the crims dashing to their cars, escaping in the fastest cars and in groups so cops cant catch you, reach hideout and repeat. The biggest danger right now is not being enought bags for everyone and someone murdering others to get their bags.
What I suggest is adding more layers of security. These are some suggestins: Add 1 or 2 security doors (one is the metar bar strutcute near the vault area entry and the other is the door on top of the stairs) that can be picked/hacked or blasted. This will slow down people and make it so you have to either hack them (which would take a while) or you can blast them (but the vault lockdown sequence would begin and cops would be notified. So its a choice between safety or speed.
You could also add more guards. Right now the guy at the vault area with the pistol just gets annihilated by the criminals. So I tought why not add more guards? And better equipped? Add like 4-6 guards (with player healt) armed with M4s or MP5 behind the pillars of the vault area. Also, I thought when players pick a bag and the alarm activates, why not spawn another 6 NPC guards heavly armed at the staff section of the bank, make them run to the hall and take positions to blast off the crims exiting the stairs room (if all that isnt feasable, then just spawn them already in the hall).
Im pretty sure a group of skilled players can go throught these without much of an issue, but i think it would be much harder that what is right now and take more time. Some people will say that this is hardcore, but you are robbing a bank, it shouldnt be that fucking easy and shouldnt only take a couple of minutes to do. Should take time and efford to do.
Thanks for reading this.