When will there be shift from a world with insufficient savings to a world with excess savings?

At the global level, we look at the total and private sector savings rate, the investment rate, capital growth, real interest rates and inflation. It emerges from this that it was at the time of the subprime crisis (2008) that there was a shift from a world with ( ex ante ) insufficient savings to a world with ( ex post ) excess savings. This implies that fiscal rules should have been revised already at that time to adapt them to a situation in which crowding-out effects were no longer to be feared .