I think that's probably correct.
I’m no longer young, but I am (touch wood) a lot healthier than nearly all of the locals I know, largely because I protect my health through lifestyle choices (regular exercise, sensible diet, careful driving, no smoking, binge drinking or binlang chewing, etc.). I have certainly paid in at least ten times as much as I’ve ever taken out of the jianbao system. After its inception, I went something like four years before I even used it for the first time. If I hadn’t got married to a Taiwanese woman, and had to occasionally humour her by going to see a doctor when it wasn’t absolutely essential for me to do so, I’d almost certainly have averaged less than one visit to doctor or dentist per year. As it is, I’ve probably averaged close to two, and have paid for all the big stuff myself (NT$90,000 for a tooth implant, NT$45,000 for a health check and scan, NT$40,000 for my daughter’s birth and a hospitalization when she was seriously ill). I am definitely not an NHI leach, and I bet the majority of foreigners here would appear on the same side of the ledger as me.
But those politicians are pandering to a strong vein of xenophobia. It might be just my over-active imagination, but when I do visit a hospital and proffer my NHI card, I sense that some other people there, usually old ones, are eyeing me malignantly and thinking: "Why's that bloody foreigner here, sucking on our NHI teat? How did he get his hands on that NHI card? It's not right, it isn't. Bloody foreigners!"