Will borderless continents solve our economic crises or will they create more inequality?

The has been many debates on the effectiveness of the EU but what about a border less Europe, geographically. What about Africa run by the AU as a government? Or the BRICS countries forming a coalition to share resources, technology, power and space? Maybe this will be a reality in a few decades. What will the effects be if continents run as states? Will this create more opportunities or will it create more inequality? Should these countries be democratic or will the government be so big that socialism take its toll?