In my understanding, the main intention of globalist is to break down the economical barrier among nations, espeically the barrier between northern and southern nations. Some ultraists even suggest that all the custom tariff should be abandoned to make global economy operated in the greatest efficiency.
If the extreme circumstance really happens, the preponderant economy and product in northern nations,especiall USA, Jap and Euro, will flow into weak market of sourthern nations without any defense and thus casuing the collapse of domestic industry.
Later,the northern would gather all the "high-efficiency and high money-making" industries, such as IT, BIO, AUTO MAKING; in the other side, the " low-efficiecny ,low money-making and high natural resources consuming " industries will be the only choices for southern nations, such as agriculture and mining. Meantime, many domestic industries could not survive.
Obviously, most of people/gov in northern nations welcome the trend and most of people/gov in south against it in the rational model.
( Though Canada is a member of G8, it is a typical village economy and contributes few things to world economy. )