I find it very depressing the number of people who call 999 because they think they are entitled to a free ride.
I read a book (from a blog) called something like blood sweat and a cup of tea written by a paramedic.
They had one guy who discovered that if he phoned 999 the ambulance HAD to come out, he also lived very near a hospital.
So he would go out on the lash, call and ambulance and walk from hospital home as a free taxi service.
One day he did this and instead of taking him to his local hospital they took him to one 20+miles away. He didn't call them again.
I've had ambulances three times. The first was called by my then GP on a home visit.
The second and third were both when I wad been woken up with severe pain and vomiting.
It was never established what the pain was but I was checked for kidney stones, gall stones, at one stage they thought an ovarian cyst had burst or it was an ectopic pregnancy, ruled out appendicitis because I'd already had it removed, thought it could be adhesions from my appendix scar, did an ECG in case it was an MI.
I've just listed those so that anyone who has unfortunately had any, you can see how much pain I was in. I had no other way of getting to hospital and I knew I needed to be there. I also knew the paramedics could start treatment / assessment with blood sugar, and obs.