I'm someone who missed a bunch of appointments in my younger days with mental health problems. I got dropped from the service due to missed appointments. I totally understand why, but it's a catch 22 when the reason you miss the appointment is the thing you're trying to get help for...
Now I'm very thankfully much much better, but there were times when I just couldn't get myself out of the house. I couldn't phone - I couldn't bear it - and you couldn't cancel by text.
Truth be told, when I paid for private therapy at £50 a pop, I did not miss so many appointments. But I did miss some still - money wasn't a total deterrent, I probably missed half a dozen over a couple of years, so several hundred pounds.
It's difficult because the danger is you're penalising people who are fairly likely to be the most vulnerable in society- whether that's mental health, or for example, my 96 year old nan who does not have a mobile phone or internet so does not get all the reminders / easy ways to cancel etc.
Where is the line? Do you means test it, like if you pay for a prescription, you pay for a missed appointment?
I don't know, I feel uneasy about it.