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Here are a lay man's observations about how it works.
Why do we have to work? So that we can buy things
Why do we buy things? So that we feel happier
Why don't we stop buying things when we are happy? Because we are never happy / satisfied with what we have got and always strive to get the new "better" thing.
As a result we have to work more and more so that we have the money to buy the things we want.
This is the premise on which our economy is based.
So what happens if we can't buy things? First we will not be happy because we cannot buy things. Secondly people who make things that we normally buy won't be able to sell so they will be out of a job.
If people lose their jobs they will have less disposable income so they will not be able to buy things... and so the cycle continues.
So the whole economy will collapse if people stop buying. scary don't you think?