Ah the old 'everyone is responsible so nobody is responsible' canard.
I will give you a helpful rule of thumb: when in doubt the guy with a bank account larger than the total lifetime income of hundreds of thousands of people is probably the one to blame.
Ah the old ‘in case of doubt just go after the rich guy’. That makes stuff simple doesn’t it ?
You can establish responsibilities just by counting the number of zeroes in a bank account. On top of this, it works for everything: the same dude is responsible for wars, the climate, world hunger, child cancer and your bathroom mirror being fogged this morning.