Governments could make a lot more revenue by taxing people who don't understand mathematics or basic probability.
Hold on, I forgot about the lottery.
Ignorance of basic mathematics is why most lottery winners end up bankrupt.
The problem is not math, though.
Kind of a funny story - my cousin and I bought a little store together back in 2010; beer and liquor, groceries and produce, and a small deli (also the lottery). Within months we were doing great! Then the State Board of Equalization showed up. We owed taxes we didn't even know existed. Plus, we had to build on a separate bathroom for customers, a new storage area, a janitor's closet with a plumbed floor sink, and replace all 5 of the drinks coolers. The building was almost 70 years old, and, fortunately, we had already re-wired everything, but the stuff we still had to do plus the taxes we weren't even aware of cost us so dearly we almost gave up rather than pay out.
But we'd bought it so cheap, and it was doing so well, we decided to hang in there. But I sold my half to my cousin after about 3 years, which is when we were finally square with the taxes and add-ons and all that. He sold the whole shebang a couple years later, and a year after that, it burned down in a wildfire.
But, my point is, you don't just have to know math, you have to know law. And financial laws and business laws (and regs) are countless and extremely complex. So, yeah, if you win a lottery, you need an advisor.