The Guardian is just a gossip rag these days in any case!
I think it is extremely important that people at all points on the economic scale receive something back from the system- people that do not benefit in any way will otherwise have no 'buy-in' and become less and less inclined to pay into the system, meaning everyone suffers.
Child Benefit isn't about the amount per week (and yes, £20 is a very small percentage of a £50k salary) it's about giving something universally to all (all who have children, mind you!) and keeping high-earners as stakeholders in the society pot.
The way the whole affair has been handled is shockingly poor- Lin Homer should be ashamed of her comments earlier this week, she shows a complete lack of respect for any taxpayers 
If families are to be assessed for benefits as a whole, then they should also be taxed as a whole, and thus those who can, benefit from 1 low/non-earner.
Paying money to one parent, and expecting another parent to pay it back through their tax bill is ridiculous. What if I choose not to tell my children's father that I've received it? He can be fined for another's actions? Outrageous really.
That's before we get to the inequity of two earners on £48k keeping child benefit but 1 earner on £50k losing it
Which utter numpty thought that would be a good idea?
But no, YABU OP, because it is important that she does rattle cages. The poor have no power in this (or indeed really any other) country. You may not agree with her, but people are vaguely listening.
Maybe she is sneery, but we all need something to sneer at to keep us going, eh? 