Why did the jeepney not evolve into Kias and Hyundais, to become a national headache?
SILLY question? Read on and the answer will be like lightning over a dark landscape.
We were not the only country in Asia where the US army left — or were sold by its entrepreneurial soldiers on the black market — thousands of its all-terrain, hardy vehicle, the Willys Quad (for its four-wheel drive), which got to be called Jeep, for GP, or "General Purpose" vehicle. Filipino entrepreneurs refurbished these vehicles for public transport, its body altered to accommodate up to even 14 passengers much than the four-pax military version.
Five years after World War 2 ended, the US was in another major war where it used Jeepneys — the Korean War of 1950-1953. After the war, as in the Philippines, the US left a huge number of of the same kind of Jeeps.
A Korean auto mechanic, Choi Mu-seong, and his three brothers managed to buy hundreds of these Jeeps, and modified them to also become public transport vehicles, in this case as taxicabs. The vehicle was called "Sibal," Korean for "beginning." And indeed it was the beginning of Korea's automobile industry which is now the fifth largest in the world.