A couple of points.
Anodyne was responding to the comment "Are you Welsh? If not you aren't keeping Cardiff open." Wales isn't self-supporting by way of revenue, so if you're paying tax in the UK you are indirectly supporting CWL.
The other point is that CWL is benefiting from support from the Welsh Govt which isn't available to other airports in the UK. An issue of fairness here, particularly as CWL is competing with other airports.