I was speaking to someone about their relative recently.
She is close to retirement age. She has worked all her life, but in the last two years she has had to stop work due to a degenerative disease.
She is living off benefits as a result, and has £20 per week after bills to feed herself and clothe herself and pay for anything that she needs (cleaning materials, toiletries etc).
She lives in a three bedroomed house. Due to her medical condition she cannot sleep in her bed, she is sleeping on her settee, so even if she could get a lodger, it would be an uncomfortable situation for her to be sleeping in a 'public room' with someone she doesn't know well.
She would happily move to a smaller house - but there are none available.
Due to the bedroom tax, she will have £12 less per week to live off, so £8 per week.
She has paid into the system all her life, and yet now, when she needs it to support her due to circumstances that she cannot control, she is getting screwed over by the bedroom tax.
I think that some people are entirely justified in complaining about the cuts.