Things that are so obvious and ingrained that no one even thinks about them.
Here’s a few:
All US americans can go to Mexico EASILY. You’re supposed to have a passport but you don’t even need one (for car/foot crossing). Versus, it’s really hard for Mexicans, who aren’t wealthy, to secure a VISA to enter the US. I’m sure there are corollaries in other geo-regions.
Another one is wealthy countries having access to vaccines far ahead of “poor” countries.
In US, we might pay lip service to equal child-hood education but most of the funding pulls from local taxes so some kids might receive ~$10000 in spending while another receives $2000. I’m not looking it up at the moment, but I’m SURE there are strong racial stratas.
The passport thing was no longer the case when I went there in 2016ish. It used to be you could go about 15 miles into Mexico without a passport but when I last went in 2016, you had to have one just to cross in to Mexico, and they were inspecting the heck out of it, and visa was required to go more than a certain distance or stay. A lot of poor Americans live south of the border in San Diego area because it's all they can afford. Mexico was pissed at Trump and changed the rules.
I like your last point on the tax thing, that's so BS the way that money isn't equal per student. It should be state wide equal property tax and state-wide equal per student.
I haven't left my country in so long, I'm curious about living near border regions (not aspirationally, though i would like to travel one day). I'm almost on an island within an island
Ive walked into Mexico from San Diego without a passport in the last couple years, you can slip the guard a $20 to go without passport lol.