Pivotal Voting

I was talking with Bernie Groffman just now and thought I'd make a record of the simple example of why apparent voting strength is not real voting strength. Suppose we have a committee on which Spain gets 50 votes, France gets 50 votes, and Andorra gets 1 vote. All have equal voting power, in fact. A winning coalition needs 2 and only 2 of the countries, and it doesn't matter which two.