We're already working together. The whole global market is a massive teamwork.
The fact is that no matter what we do, we cannot have everything. Resources are not infinite. And I'm not only talking about raw materials, but processed consumer goods and services.
People are unique, and thus their preferences are unique. It's impossible to satisfy everyone's every need. Mostly, because there's not enough of different resources available (physical materials, ideas, labor etc).
It's a completely impossible idea that we can all just chill at home while some automated system provides us with everything we might ever want.