Bear in mind that everyone is different. Some people like to save so they can buy treats (be it a car, holiday, or a new computer etc...). Some people like to save for a rainy day fund. Some people are saving for a house. Some people just don't like having all their money in one account and squirrel away money to either invest or have a few savings to help them live in a debt free environment.
Saving helps some people (me certainly) in terms of financial planning. I know a lot of people have multiple bank accounts and assets in different things, not only property.
Just because someone puts aside a large proportion of their salary doesn't really tell you much, as they could be living at home with parents, have low expenses and whatever.
I don't think it is stupid not to save, but at the same time I wouldn't be comfortable if I didn't have a bit of a buffer. Saving for property is also quite a large financial undertaking!