The shifting from short term investing towards long term will certainly require a new figure : the long term investment manager. In this case a totally new function will be required for a lot of reasons. In this case they do really earn their own costs !
I'm coordinating aThink Tank about "European Fund for Common Good Innovation" trying to connect Long Term Investing to Long Term Planning ai Institutional level : from the very first steps we see a large amount of work in deciding and monitoring.