All local politics is global

Or so Benjamin Barber would have you believe;

Prof Benjamin Barber is the author of an intriguing book called If Mayors Ruled the World.

They can only do so by collaborating with one another to...lobby national governments;

Now, mayors and local politicians the world over have taken up his call to arms and are on the verge of organising the first ever Global Parliament of Mayors.
The aim is to bring together some 600 mayors from around the world to London as early as next year, where they will announce themselves as a new political force - global in reach, local in experience and achievement.

Except for the local problems of traffic congestion--easily resolved using the pricing mechanism to ration road space during rush hours--potholes and crime. Those are the opportunity costs of globe trotting mayors.