It seems Lauryn Hill is about to find out:

Singer Lauryn Hill on Thursday was charged with failing to file federal income tax returns for three years during which she earned more than $1.8 million, officials said.
Hill did not file an income tax return to the Internal Revenue Service from 2005 to 2007, the Department of Justice said in a statement. During this time her income, which primarily comes from recording and film royalties, totaled more than $1.8 million dollars.
What did we learn today? Hill is not doing badly. She has not released anything substantial in 15 years and yet still earns $600,000 a year. That's some serious money for doing nothing. But let us take a moment to remember the time when Hill made money from making music: