I'm not the person you are replying to, but I do wonder what "third world countries" you are thinking of when you hear "Western Europe"?
As someone who has lived in both the US and Germany (one of those "third world countries" with significantly lower health care cost, for both humans and animals) and who has seen the benefits and drawbacks of both countries - it's completely delusional if you actually believe that someone who is supposedly living paycheck to paycheck is getting better health care in the US. The German system certainly has its flaws, but it beats the US in just about every sensible metric (accessibility, cost, life expectancy, infant mortality etc.), usually quite significantly so. The US does a solid number of things better than other countries, entrepreneurship and innovation for example, but health care absolutely isn't among those things.
What's new to me (I had no exposure to the veterinary health care system during my time in the US) is that the inflated fantasy prices aren't limited to humans only, but extend to pets as well. Anesthesia and extensive wound care, antibiotics, aftercare etc. are pretty standard therapies and they should cost little over a tenth of what you were quoted for your typical house cat.
You honestly might want to shop around, because even within the US, those rates are almost certainly inflated.