Unemployment benefit fraud on a massive scale?

I have recently come across a quite alarming situation. As a tax payer, I get quite upset when i read about a flagrent abuse of our social security system. It appears here in the uk we have been supporting a woman who has never worked for a living, has a large inner city council house on which she has never paid rent, has never paid council tax and has never been called in by social security workers for a restart interview. She has 4 children and grandchildren all at the tax payers expense and appears to have drawn an excessive amount in unemployment benefit. Also, it has been exposed that she has made numerous applications for housing benefit at a variety of addresses all over the uk.
Recently she has, again of course at our expense elected to go for a short holiday in the USA. Dont you think this woman should be arrested the second she returns to the uk?