"The failure of Greece, " he said, "would be the failure of all Europe... it is not possible to let Greece fail, for moral and economic reasons".

BBC: The Greek conundrum

In this regard, some particularly thorny issues are raised by the existence of financial institutions that may be perceived as "too big to fail" and the moral hazard issues that may arise when governments intervene in a financial crisis.

FORBES: Reducing Systemic Risk

The sorry consequences of letting Lehman Brothers fail, which was intended to discourage moral hazard, showed that the middle of a crisis is not the time to get tough.

ECONOMIST: Financial economics

No one in Washington, from Congress to Pennsylvania Avenue, will fail to understand that Americans take seriously their moral obligation to address the climate crisis.

CNN: Obama, turn climate 'priority' into leadership

Importantly, as my FOMC colleague Gary Stern has pointed out, it would also mitigate moral hazard and the problem of "too big to fail" by reducing the range of circumstances in which systemic stability concerns might be expected by markets to prompt government intervention.

FORBES: Reducing Systemic Risk

We think a capitalism that lacks outside moral influences and pressures, restraints and safety nets would, sooner or later, fail.

FORBES: How Moral Is Capitalism?

All state schools are required to provide a daily religious service (though some fail to do so), to teach religious studies and to promote the spiritual and moral development of their pupils.

ECONOMIST: Schools and religion