

You have to pay a highly educated individual to spend hours finding any weakness to hack anything.
If you hack a big organization you’ll get more then a few dollars from a bank account. They also have a lot more things that could be vulnerable to hacking.
If you live in an open and transparent society: there will be an investigation and there is a high chance they will find out. You’ll be expected to take care of the mess with disaster relief for the survivors. Also about 40% of the people did vote for you. Also even the ones who did not vote for you still pays tax.
If you live in a dictatorship: police brutality is cheaper and is a bit more selective in it’s targeting.