Earlier quoted context omitted.
Why does only cover "package holidays" and not all round-trip air tickets? That distinction doesn't make sense except as a subsidy of package deal providers...
It’s not a subsidy; the companies which sell package holidays need to put the cash up. It was done because of financially unstable package holiday companies setting up and then failing leaving people stranded. Most people in the UK know to buy an ‘ATOL Protected’ holiday if they go for a package deal.
Why doesn't ATOL protect non-package customers of Thomas Cook airlines? Why didn't it protect the customers of Monarch Airlines? Given the large number of airlines that have collapsed and stranded customers in the last couple of years, the "holiday package" limitation just doesn't make sense.