However, while foundations may want to catalyze innovation on behalf of poor children, they must be careful to avoid treating schools and communities as laboratories, particularly when poor families are so susceptible to the threat of uninformed consent. In fact citizens are beginning to push back against foundation funding of ‘proof points’ in their districts, arguing that schools are not testing grounds for wealthy philanthropists to conduct their social experiments. In 2016, for example, the California NAACP called for a national moratorium on all new charter schools.

Until recently, public opinion on the democratic responsibilities that accompany private philanthropy by the wealthy was fairly indifferent. A 2006 study, for example, found that 98 per cent of press coverage on philanthropy was neutral or positive in nature. But since then the debate has opened up, and school reform has become the centerpiece of efforts to highlight the dilemmas involved in ‘private funding for the public good’ as philanthropy is often described.

The key issue here is accountability, not stopping the flow of funding into schools that desperately need resources. Foundations are almost unique among large institutions in being free of accountability mechanisms with teeth, so long as they file some basic paperwork with the IRS and steer clear of openly partisan politics. A private corporation or a government department would not have weathered the cycle of interventions in schooling that the Gates Foundation has pursued over the last 15 years—they would have been held accountable for their failures and subject to greater scrutiny by the public.

That’s very difficult to do with foundations because they are self-funded, self-appointed and largely self-regulating institutions with no democratic mechanisms for debate and accountability, but it would certainly be possible for governments at the state and federal levels to mandate the inclusion of members of the public such as teachers, school superintendents, and independent education experts in deliberative processes around any major innovation, and to enforce regular Congressional reviews of foundations’ work whenever it aims to change national policy around public goods like education.

Foundations are notoriously insular institutions, which rarely welcome or seek out criticism, especially from the voices of affected communities. They also tend to resist attempts to regulate their activities—arguing that this would inevitably lead to political interference—but the balance of accountability has swung too far away from public oversight. Even small-scale measures like improving the diversity of boards of trustees have been opposed or watered down by foundation interests.