If she kept her full salary then spoke with passion about helping people on a lower income than her then you strike me as someone who would probably call her a hypocrite and say "why isn't she giving away some of her high salary if she's that bothered."
You sound so very spiteful and angry. And you really give away 10% of your salary (or is it take home - can you clarify? Apologies if you have already) to charity?
By the way, the vast, vast majority of the population absolutely know that "salary" doesn't equate to their take home wage.
Calling it a publicity stunt as if it's a cheap and self serving claim is ridiculous.
I guess you could call it a call to attention / awareness drive, it's calling attention to the issue of low wages and perhaps encouraging other high earning MPs to potentially do the same.
I presume she is also trying to show her constituents that she takes her role seriously and reflects her party's stance on supporting workers who don't have huge salaries.
She is 23 years old and sounds infinitely more mature and empathetic than you.
Your comments on this are mean spirited and nasty.