Why can someone drive for 6 months in a country with a foreign driver's license but can't get a local license? A government issued id, like a driver's license,

Why can someone drive for 6 months in a country with a foreign driver's license but can't get a local license? A government issued id, like a driver's license, is often required for various services like opening bank account, a telephone connection, avail some government service etc. Thus a local driver's license can be used for deception by a foreigner who wants to pretend to be a local citizen.