I think the laddie above is confusing sovereignty with globalism.
globalism(Noun) An ideology based on the belief that people, goods and information ought to be able to cross national borders unfettered.

    A socio-economic system dedicated to free trade and free access to markets.
It has upsides and downsides.
There is no question that globalization has been a good thing for many developing countries who now have access to our markets and can export cheap goods. Globalization has also been good for Multi-national corporations and Wall Street. But globalization has not been good for working people (blue or white collar) and has led to the continuing deindustrialization of the west.

Labor can move from country to country to market their skills. True, but this can cause problems with the existing labor and downward pressure on wages.