“ when each individual knows for what he is responsible, and is known to others as responsible for it ”
 John Stuart Mill, Considerations on Representative Government (1861). copy citation

Context

“when the business is conveniently distributed among those who are to transact it, a convenient and methodical order established for its transaction, a correct and intelligible record kept of it after being transacted; when each individual knows for what he is responsible, and is known to others as responsible for it; when the best-contrived checks are provided against negligence, favoritism, or jobbery in any of the acts of the department. But political checks will no more act of themselves than a bridle will direct a horse without a rider.” source