The International Monetary Fund encourages economic development following the fact that it’s an agency that helps to promote economic cooperation. This is following the maintaining an orderly system of world trade and exchange rates
The International Monetary Fund was an intergovernmental institution founded in 1944 at the Bretton Woods Conference and based on the ideas of Dexter White and Keynes. It aimed to build an international payment system in order to assist countries which suffer a problems and disequilibrums in their balances of payments, so that they can boost their economic growth figures. All member countries contribute by pooling money into a common fund, an in case of trouble they can borrow money with favourable repayment conditions. This system also limits the 'abuse' of those countries that are obtaining benefit from the trade deficit problems of others.
The Group of 8 or G8 is an assembly that gathers the goverment political representatives of France, Germany, Italy, Japan, the UK, the US, Canada and Russia (Russia has been suspended since 2014, leading to the emergence of the G7 instead). The aim of the assembly is to discuss issues that involve all its participants such as economic and social development, labor, trade, law enforcement, health, energy, environmental sustainability, foreign affairs, terrorism, etc. Regarding economic issues they can adopt different types of decisions in order to encourage growth, or to limit the action of countries that are making profit by hampering others.