Actually I think the reason that there is no Pay to Butcher is because not many of the general public would happily go under the scalpel of the latest rich kid wannabe surgeon. Certainly nobody that I know would anyway.
However, they appear to be more accepting of the flying version of PtB. Why? Knowledge, or lack thereof, of the risks involved. Maybe.
Standard CRM stuff, a group is more likely to do something risky than an individual.
Nothing will change all the time there are 0 hour wonder kids willing to work for French fries. In my view this airline career path is dead. Accountants have seen the light, woken up and smelt the coffee and will fight tooth and nail to keep salaries down so not the effect the bottom line for share holders.
If you want change the only way is what the Lisbon guys are doing, period!
I hate unions, but this is what it's come to. Planes stop flying and profits stop coming and the company will start talking.