Someone even commented like why is SAARC necessary when there is no common contribution in economic progress?

I'll say SAARC countries share so many common things like culture, language, ppl, landscape, climate and so on. Then why can't ppl in this region live with common interest for the regional development. Look at NAFTA and EU, they r more diversed than we r. Look at the immigration problem right now with mexico and US. They r working together for the regional properity then why is it only India as the major importance when we all saarc nations r trying our best to move ahead? why only economic success of india is taken as the key issue?

may b none of the countries in this region r dedicated enough to move ahead.