I think economic methods would be best. Most if not all would leave willingly with an end to all GIBS and a financial incentive to go… I always liked the idea of welfare for life if you leave and give up citizenship. Prisoners included. Not RAY-CYST. If you want free money then take it and go. If done for a few generations the nation would be a purified hardcore productive place that is safe and wealthy. The 'cost' of this would be negative compared to what we pay now.