What economic policies with a view to a recurrence of crises?

The world is experiencing a succession of crises (subprime, COVID, etc.) and we should probably expect a recurrence of the crises (health crisis , or economic crisis if the reaction to the previous crisis gives rise to financial imbalances). What are the economic policies needed in OECD countries if we believe this assumption of recurrent crises is correct? Establishing social safety nets to prevent certain social categories from being unprotected during crises; Restoring fiscal and monetary policy space during growth periods, between crises; Encouraging corporate financing with equity rather than with debt; Preventing excessive household debt through macroprudential policies.