And keep in mind that isn't even his firm giving the money. Also, giving more than $2,700 to a candidate is illegal anyway, so "financially backing a candidate" is kind of a nonsense standard to hold a person to.
Money in politics is a problem, to be sure, but one that is commonly overstated in this sort of light, and what you are saying here is that he should be giving more money, which is kind of the opposite of what we should be thinking of things.