In short, you are going to need your spouse to work as well. Then things look up, so long as both of you work. Good luck if you aren't dual income, though.
Folks in the US die preventable deaths, by the way. And a lot of "third world countries" have health care in place, sometimes more fairly widespread than the US.
/sarcasm
Median family income is ~86k. [0]
Median household income, which is likely what you wanted to cite and is the more common measure, is still much more than 50k, at ~68k. [1]
Median personal income is about 36k. [2]
Median hourly wage is $20.17. [3]
So, no, a $15/hr Amazon worker isn’t making above-median wage and, even if they work 40hr weeks for a full year, isn’t making above-median income.
[0] https://fred.stlouisfed.org/series/MEFAINUSA646N (nb: “family” for this purpose is defined basically as a household of two or more related by blood, marriage, and/or adoption.)
[1] https://fred.stlouisfed.org/series/MEHOINUSA672N
[2] https://fred.stlouisfed.org/release/tables?rid=249&eid=25956...
$31.5k is a middle class income there and certainly not poverty level.
House prices aren't telling you anything: Poor folks have trouble saving up for a down payment and have more issues keeping credit good enough for a house, due to lack of funds to pay things. House prices matter little if you can't actually qualify to buy them.
This is also pretty much at the poverty line if relative poverty is calculated like in most other OECD countries - as 60% of median income. That would be about $3100/month for two adults.
That’s Amazon’s minimum, not average. That is, every Amazon worker makes more than that.
https://www.glassdoor.com/Hourly-Pay/Amazon-Warehouse-Worker....
This is apartment rental income, not ownership class income.
https://www.census.gov/programs-surveys/ahs/data/interactive...
It's certainly not true that a $15/hr wage at an Amazon warehouse alone can "very much" support the "extremely high standard of living in the US" mentioned upthread as a general statement of fact.