This framing conveniently ignores the question of whether the president should have the authority to single-handedly withhold funding for universities, broadly considered to be one of the foundational pillars of America's strength in the 20th century. While I think it's interesting and answers the specific question it raises, it's wild that the economist has just accepted that the president has dictatorial powers.
The word "dictatorial" doesn't apply here. What we're talking about is government funding being provided to private universities. And Congress hasn't appropriated specific amounts of money to specific universities. It has created a pool of funds and given the executive branch discretion to allocate those funds. The powers of the executive branch are invested in the president. See Article II, Section 1 ("The executive…
To put it differently: a state of affairs where the Executive/President has those powers may not be dictatorial, but this specific instance of him making use of that discretion in this specific way might be.