Academic salaries are lower in the US relative to industry salaries than in most other countries. While the nominal sums are high, the salaries are low relative to housing costs. Particularly because good universities tend to be in expensive areas. When you compare two academics in similar positions in the US and Europe, the European is more likely a homeowner.
Yeah, but you can pull some coin in R01 grants here in a way that you simply cannot in other countries. Shared facilities is another factor. Schools will throw down for a new cryo EM. Might be fully funded by a couple donors along with an entire building around it for the cost of putting up a brass sign with their name by the door. Other nations might be still using soviet equipment.