Not what he meant, but

During the VP debate JFK was cited as someone who cut taxes and had a growing economy.  My understanding is that LBJ got it passed, but that doesn’t matter.

I don’t know the numbers on the economy then, but I’ll concede the point for the sake of argument.  The tax rates under JFK/LBJ led to a growing economy.

So let’s have the JFK top marginal tax rate of 70%.

I think that would help the economy significantly.