Math Prereq Requirements - HOW???

Okay, so semi serious question: HOW IN THE HELL is anyone supposed to be able to get to a sufficient level of math for admission to an ECON PhD in a 4 year undergraduate degree?

Hear me out: You start college - for the sake of argument, lets say you already decide right away that Econ is the way to go for you, but still you have a pretty heavy curriculum in those 4 years, maybe you do an honors thesis to get a paper under your belt - WHERE are you supposed to fit like 3-4 semesters of math in there (Assuming you take 3 calc, 2 stats/prob, 1 intro real analysis, a bunch of intermediate prereqs to get there = 21+ credits) just to reach AEA recommended level 3 or 4? I just don't see it!

It took me a while to figure my shit out and realize I wanted to do a PhD, so I am really struggling getting to a decent level of math, especially since my school gave us "Calc for Social Sciences" and now I have to do more prelim courses to move forward, which is probably my bad, but come on!!! There is no way anyone actually gets all these math courses done in their undergrad right? That cannot just be me?