So NooBHA - Is 40K for doing a full time 24/7 job of bring up 2 of someone else's children really so high?
Ok so assuming you have to give up your job to take on this role, that's a loss of your net salary - say 20k per year assuming an average wage
Extra cost of upgrading to say a 3 bed house...
You can't beat a bit of poverty porn to grab people's attention and set off the moralising. Easily detracts from the inequality and the increasing gap between the rich and poor, much of which we are born into, which is really what differentiates us.