In the West of where? Of the US? Spain, France, Italy are major Western European economies, and the amount of "working age people" who can save 800-1000 dollars a month is very far from 90%. It's probably not even 30%.
Why is everyone so poor in Europe?
Taxation, mainly. It prevents the economy from developing, preys on the gains made in the past until they're gone, and then it directly steals whatever is left for people to earn.
Socialism
yeah guess what, since coming to Germany, I've been used to choosing carefully which meat to buy in a grocery and which fruit juice can i afford. it's fucking hilarious because back in China i could order takeout of fine made restaurants every meal, i never worried the cost of dining. I'm still trying to figure out why everything in Germany is so expensive while the services are so awful.