It's not by any means all roses, but Taiwan has many obvious advantages over the UK (and much of Europe) for post-retirement living. Among the most obvious are:
(1) You can live quite comfortably on modest savings and/or a meagre income.
(2) You needn't go in fear of being mugged or bothered by aggressive chavs every time you set foot outdoors.
(3) You have access to an excellent, not critically overburdened, and free or all-but-free health service, without having to face anything like those terrible NHS waiting lists.
(4) It's seldom cold even in mid-winter, especially down south, so you don't have to worry about suffering from hypothermia.