Is a negative number a good thing or a bad thing? Maybe its a good thing and the country managed to equalize wealth more. Unlikely, but maybe.
One of the more famous Danish millionaires have recently criticized the governments plan to target people like him with a new tax. He already announced that he wouldn't be paying it, opting instead to "reallocate his funds" to keep him out of the new tax bracket.
Many countries would no longer have the tax revenue to pay for education, healthcare, feeding schemes etc.