[cameronh90]

I can promise you that the many smart people working in hospitals have considered this issue.

If someone is walking-wounded, they WILL be unloaded to sit and wait for 6 hours in a corridor.

The people who the ambulances are holding for long periods are those who are too sick to be left without attention. The paramedic staff continue to monitor them in order to escalate further if their condition deteriorates, and depending on the situation, medical staff from the hospital will be involved in this.

The ambulance staff obviously have a moral and legal duty of care, and can't just leave a seriously unwell patient on the floor outside the hospital entrance to get to the next call, which would likely be a patient no more ill than the one they just abandoned.