It's outrageous and just another reason why child maintenance should be a cumulative life-long debt, not extinguishable by bankruptcy or death.
Maintenance payments due (accrued debt) should also be subject to a reasonable minimum whether or not it is currently affordable because the non resident parent is unemployed/"self-employed but not earning much"/ a SAHD to his new partner's children. The non resident parent's financial circumstances will fluctuate through-out their life but at present they just need to manipulate their income to be low until the kids no longer qualify for maintenance support. Making it a life-long debt would remove the incentive to use avoidance/minimising techniques. Pay less now if your financial circumstances appear to indicate that you can't afford more at this time but any shortfall of a reasonable minimum should accrue as still owed just like with any other cost in life.
In way too many cases the non-resident parent gets to manipulate the situation regarding their income until the children are adults and then in theory the resident parent no longer qualifies for receiving the contribution towards their financial upbringing.
End result ? Too many women scrimping/going without themselves to try and reduce the financial impact on the children. The kids may have reached adult age but the resident parent who had to make do without the appropriate contribution from the non-resident parent for so many years is left with a life long deficit in overall income which will impact on their quality of life/ability to provide for themselves in retirement. If the resident parent used their own additional labours/funds to make up the shortfall in contribution from the non-resident parent then they should still be owed that money that should have been paid over to the by the non-resident parent right up to the point the non-resident parent dies and it should then be taken from any assets they have at death.
The simplest form of securing the debt is for there to be a charge over any property the non-resident parent may own, although this won't be possible for non home-owners naturally.
There's also the option of not processing any passport application of a non-resident parent with arrears of child maintenance. If you can't afford to support your children you can't afford trips abroad (and no arguing that someone else is paying for the passport/trip abroad or that's is essential for visiting sick/dying relatives overseas) and NRP's should be embarrassed to admit they can't get a passport to travel because of their arrears with child maintenance responsibilities.
CMS are blunt toothed/barely fit for purpose.
If the majority of Resident Parents were male, would this matter have been given more thought as to fairness ?
Anyone who has commented on this thread in support of the debt being cancelled, hang your head in shame ! Where do you think the money came from to support the children whilst the NRP didn't pay what they should have done ? OP is owed the money, can't you see that ?