How do they afford to live? I often read about exes that have quit their jobs to avoid paying CM. Are there that many self-employed/cash in hand/family support set ups that enable them to not work?
How do they pay their other bills? Where do they live? Presumably they're not all on benefits, as if they are, the DWP requires them to find employment at some point and sanctions them if they don't.
Surely you wouldn't just choose a life of struggle, just to spite your ex and children?
If your ex has given up his job to avoid CM payments, how does he support himself?