Germany may have to pay 4.5 billion Euros when Brexit happens

This was the main reason why people in the EU didn't want the UK to leave as the second biggest contributor to the EU coffers.

http://www.reuters.com/article/us-britain-eu-germany-idUSKCN11G0I9

It's not surprise, and I wonder what other countries think if they have to make up the shortfall? Some one will have to pitch in more to pay for all these new members.