Then you make the victim totally dependent on you for every normal purpose ~ eating, drinking, going to the toilet, bathing, dressing, etc.
This gradually induces a feeling of dependency backed up by a powerful feeling of depression.
It can take as little as a month ~ we call that Stockholm Syndrome. It may take 6 months to a year ~ and if it takes longer you send the victim down the line to a tougher master who might start inducing depression with torture, or by cutting off fingers or toes.
You could probably use electric shock to speed up the process
Are you talking about the Democrats?
Or, you could always make them pay taxes and rig the district to insure perpetual re-election of the "Massah".