The judiciary and law enforcement absolutely must be held to a higher standard which does not accept mistakes. They are not 'any job role' -- these people have the authority to take away your livelihood, if not your life. The standard they must be held to should be perfection and nothing less. Any deviation from such should be treated as harshly as the worst criminals are.
> Where serious wrong doing occurs we should expect disciplinary action
_Any_ wrongdoing by law enforcement is serious.
> the answer is how much malfeasance and corruption is tolerable, because we’ll never have none
Just because we won't ever end up at 'none' doesn't mean we need to be accepting of anything less. Zero malfeasance, zero corruption. Anything but those should be burned out as a cancer, even if that burning out needs to be literal.