The world is full of stock exchanges. Not only do about 100 countries have a major stock exchange, but many countries have multiple regional exchanges as well. Countries large and small, developed and emerging, socialist and capitalist all feature stock markets to match up investors and businesses.
Only in the United States is it difficult to start a local exchange. Part of the reason is that New York is so good at what it does; part of the reason is institutional bias; part of the reason is mind set. But none of these is a sufficient reason to prevent local stock exchanges. They explain but don't excuse our lack of experimentation.