World leaders and economic advisors wanted to create a more global, interconnected economy because they believed it would lead to increased economic growth and prosperity. By breaking down trade barriers and encouraging investment between countries, they believed that countries could specialize in the production of goods and services in which they had a comparative advantage, leading to greater efficiency and higher living standards.
As for whether the new global economic order promoted neocolonialism, that is a matter of debate among scholars. Some argue that the policies promoted by institutions like the IMF and the WTO have disadvantaged developing countries, as they have been forced to open their markets to foreign competition and implement economic policies that may not be in their best interests. Others argue that these institutions have played a positive role in promoting economic growth and reducing poverty in developing countries. Without a specific reading I cannot provide a concrete evidence.
