Queen of the Blues targetted by IRS

It is well known that the US tax system is skewed in favour of the the very wealthy and very strongly biased against the average taxpayer. It is also well known that the IRS seems to make a point of targetting celebrities.
The latest would appear to be Koko Taylor, so called Queen of the Blues - known for such songs as 'Wang Dang Doodle', 'Love You Like a Woman' and 'Tease Your Man'. Now, I must admit I knew very little about her before my interest was piqued by this:
This short article has a few details on the subject.

...the IRS says Taylor must pay $400,000 in back taxes, penalties and interest. Otherwise, she faces the possibility the G-men will grab most of her income, including royalties and Social Security, and maybe even her home. The feds rejected her offer to take out a reverse mortgage on that house and pay $200,000 plus up to 50% of any future net revenue, moves that would allow her to remain in her residence and live out her remaining time with her second husband.

I can't see why the IRS doesn't just take her offer. What sense is there is scapegoating an eighty year old woman who in a civilized society might be regarded as a cultural icon and treated accordingly? The people working on her case must feel very proud of themselves...

Here is the official Koko Taylor site. No mention here of the tax woes but then it is probably not something an artist wants publicized.

Here is the Koko Taylor MySpace page where you can hear a few tunes. It is indeed a hard pill to swallow...