What country?
Not sure if you'd have a better outcome in the US, if anything you'd be WAY poorer.
A friend whose wife had cancer ended up going to a Sao Paulo clinic.
What I found was that there is proper healthcare here, but it is all out of pocket. Only accessible if you can pay for the oncology drugs from the pharmacy that imports it from the US.
Otherwise you form queues waiting and waiting for the government to get hold of the drugs (it almost never does) and waiting for them or repair their radiation machines which are always broken.
It appears from that we'd need my family member to relocate there though, since chemo treatments are usually ongoing for years at a time.