As I said before, based on the job they do and the responsibility they take on (compared to the average worker) I think they are poorly paid in the main. I'm not sure you saying "they are not poorly paid in the main, but many should be on more money" makes much sense.
Of course it is, but the same could be said for most jobs. Lots of fruit pickers and hotel maids for example come here because our wages and standard of living is higher than their country. That doesn't mean fruit pickers and hotel maids are well paid here.