Measurements of money, time, and distance usually require a singular verb.
Maybe it's because they're such singular fixations: you're always totally focused on them—"I'm so broke." "That's so long from now." "That's so far away."
Whatever the reason, it can get kind of confusing. Why is a million dollars more than we'll ever have? Shouldn't it be aren't?
Nope. And we have no reason why.
Just deal with it.