VANCOUVER, British Columbia, Feb. 23 — The Cambie Surgery Center, Canada's most prominent private hospital, may be considered a rogue enterprise. Accepting money from patients for operations they would otherwise receive free of charge in a public hospital is technically prohibited in this country, even in cases where patients would wait months or even years in discomfort before receiving treatment. But no one is about to arrest Dr. Brian Day, who is president and medical director of the center, or any of the 120 doctors who work there. Public hospitals are sending him growing numbers of patients they are too...