Publicly-funded privately run schools place stress on the main public school system.  Many of these private schools are selective in their program offerings and admissions, resulting in streamlined programs that look cheaper on paper and are likely to have better standardized evaluation metrics. This can be misleading as they often do not share the extent of the responsibility of a full-public school program.  I would prefer to see extra funding to allow more diverse programming within the public system than have private schools funnelling resources away from the public system.