One of the key problems is that money is needed more urgently at the 'bottom' of the ladder, for the people with mortgages and bills to pay. Govts are only used to giving money to the 'top' of the ladder to corporates and their own works.
Putting money in at the top is not great as so little will reach the bottom. This needs a complete rethink by Govt and central banks. Neither of which are renowned for being able to change their entire way of thinking. Leave alone in the space of two weeks.