A couple points. Corporations are already accumulating vast stores of cash, indicating that they've run out of worthwhile investment opportunities:
Maybe more to the point, trickle-down describes increased after-tax income to the wealthy, rather than coprorations. In theory it would lead to increased investment and a growing economy. In reality it has never borne out that way. There is already a glut of savings (see high asset prices world-wide), and it's demand that the economy is craving. Increasing after-tax income to middle and lower classes would feed that demand, as they have a higher propensity to spend increased income rather than simply add it to their investment asset base.
If there were ever a time where demand outstripped deployed investment capital, you might make a case that increased income to the wealthy would be called for. That does not at all describe today's world though.