Oh is it? really?
In the real world (not the fantasy land of trickle-down economics), money that is saved in stocks, bonds and bank accounts is NOT immediately put to use by companies, banks or governments.
Banks have done a terrible job putting the money given to them by the government and the Federal Reserve to work. Small business lending dried up and has taken years to recover, despite all the efforts to convince banks to do otherwise.
The government did a notoriously bad job of putting the stimulus spending money to work.
As for businesses, hiring has been slow, wages stagnant and investment weak for years, despite an excess of cash (profits).
Almost nothing has been done to stimulate demand, much has been done to stimulate supply.
So, arguments about "hoarding" have not only economic basis, they have a basis in fact as well.
Granted, on those grounds, Sean Parker should be lauded for putting some of his money to work.