Economic system depends on US

We need to change the economic system so that it no longer depends on how well the US us doing.

For example countries such as the UK are starting to do well coming out of recession but then the US goes into to negative growth and starts to jeopardise it. Why?

>>1
For example countries such as the UK are starting to do well coming out of recession
Proof? Last I heard, the UK is approaching a deficit equal to that of Greece.