Certainly, some savers might suffer from a temporary period of low interest rates, especially if they rely on interest income and cannot smooth their consumption through credit. But whatever financial assets savers hold, in the final analysis their return always depends on the growth rate of the economy.
It is therefore in savers’ interest as well that growth does not remain subpar for any longer than is necessary, and hence that we avoid any permanent damage to potential growth through socalled “hysteresis effects”. Otherwise, financial returns for savers would end up permanently lower over time.