I think people need to be mindful of the recruitment & retention crisis in U.K. teaching.
I'm overseas, in an international school, & my work/life balance, finances, & the quality of my own dc's education are quite astonishingly better than they ever were during my 15 years teaching in the U.K.
Nonetheless, we still normally struggle to recruit; teachers aren't generally desperate to bugger off to the other side of the planet on a whim - they have extended families, they don't want to live in a very different culture, they aren't that keen on all the logistics of shipping their stuff about & living in rented staff accommodation, & so on.
This year our applications have skyrocketed from the U.K. 30-50 proceedable applications where we are used to 3-5.
Colleagues already on the international circuit who are used to thinking 'mmm...Malaysia next year maybe?' or wherever, & swanning into a choice of jobs, are finding they're up against massive competition from highly qualified U.K. teachers looking to move abroad.
Anecdata, I know, but there's a definite exodus from the U.K.
I think all those arguing that U.K. teachers should somehow suck up working their unpaid summer holidays whilst being called a bunch of workshy bastards, need to recognise that quite a few of those teachers are thinking 'yeah - screw this for a game of soldiers; I'm on TES international & actually Qatar/Ascension Islands/Beijing looks quite tempting.'
& international schools are suddenly in a position to be fairly picky, so it'll be the talented, gung ho, highly qualified & adventurous teachers we are taking from the U.K.
Even for the most hawkish critic of teachers, it seems bloody daft to push them to a point where significant numbers of them just fuck off (not just overseas, obviously - I'm of an age where ex colleagues are also bringing forward retirement to get out of U.K. teaching).
Teachers are expensive to train & drop out rates have always been high. It's incredibly short sighted to blithely continue shitting on them, if you want to keep the education system in the U.K. just about hanging in there.