Accounting scandals at Fannie Mae and Freddie Mac may have raised the specter of a tough new regulatory regime, but some critics say that privatization is still the only solution for lingering GSE problems. “The special governmental links that apply to Fannie Mae and Freddie Mac yield little that is socially beneficial, while creating significant potential social costs,” said the conservative Cato Institute in a report issued this month. “The best policy would be to privatize…