Learn English – Does the word “exgest” exist

Welfie appears in the related terms for Yuppie on Wikipedia, meaning "a poor urban professional", but there's no reference given.

However, I did come across this list of "Essex" terms (Essex is a county just north-east of London). Welfie, meaning rich, appears down towards the bottom of the list.

Here in the UK then, it means something more like wealthy than on welfare. Substituting th with f is fairly common in some dialects in England.

I also found this blog for you. This gentleman appears to be from the US, and using welfie as short for welfare, though not quite in the same way as you suggested.

Last, I found this book review, which uses welfie in the way you describe.

(For reference, I found these by Googling terms like skiving welfie and poor welfie. Sometimes searching for related terms can narrow the search down. Also Google will automatically try to correct your spelling, in this case unhelpfully.)

I could find a few articles where actually the term comparator as a noun is used in relation to economic issues meaning 'something that compares'. I think it may be a figurative use of this term more commonly used in mathematics/engineerring contexts. Though not a common term, it is used in economic and financial contexts:

Comparator UK US /kəmˈpærətər/ noun [C]:

an organization, activity, etc. that is used to judge the performance of another similar organization or activity: » The comparators for Infobank are Ariba and Commerce One - all three provide online software.

1) Defining the scope of economic evaluation study and selection of comparators.

The present study describes key components used in defining the scope of economic evaluation study and selecting comparators. All relevant recommendations from international economic evaluation guidelines were reviewed and compared.

2) Does N = 2? Trans-Tasman Economic Integration as a Comparator for the Single European Market.

An apparent lack of similar cases has shaped how observers compare integration in Europe with other regions. The growing field of comparative regionalism, however, has overlooked three decades of sustained economic integration between Australia and New Zealand.