What about some wide open spaces?

One assumes that those who decide on the width of spaces in car parks drive around in Mercs, BMWs or 4X4 leviathans wider and longer then the average living room so why do they seem to assume that the rest of us, the peasants, all drive around in 1934 Ford Populars and all weigh about 9 stone so don't have to open doors that wide to get in and out.

We must be the only nation in the world where a car parking space is the width of a car with so little room for opening doors that drivers and passengers would find it easier to clamber in and out through the sunroof.