At the same time we must ensure that the supply stays sufficient and create some money uniquely dedicated to investment: the same way we will distribute money for consumption, we will emit money to people that will be dedicated to investments. Those investments would be chosen freely by the people. Of course they would be remunerated as a function of the way they help reach the goals of society at large: maximization of transactions, full employment and fulfillment the basic needs of all.
The purpose being to adjust the direction to which the invisible hand leads us. Instead of leading us to the Liquidity Trap it will lead us to a maximization of transactions and employment: