It's a global problem, and it will only ever get worse as our societies become more and more focused on the individual.
Here in NZ, the road code states that you must keep left unless passing, and there are road rules that allow the police to issue tickets to people who obstruct the flow of traffic.
None of which means shit, because no one reads the road code the police have a mandate to make people drive slower, so don't stop those who obstruct traffic.