Some countries still do it, Mexico for one, you pick a ball out of a bag, depending on the colour denotes the section you take part in I think, and at the end you have a one in 3 chance (ball in a bag method) of having to do another 2 years.
I reckon they should have it here to put a stop to the likes of car keying chavs etc.
On the ambulance front, its not your fault, and if your car cannot physically be driven out of the way without causing damage, you are within your rights to stand still. The ambulance driver should know which routes are busy at which times, and take the appropriate routes, which they clearly didn't.