...but Bill Gates, Jr., and most especially Bill Gates, Sr., are not at all against this. Bill Sr. has written a book calling for higher taxes, in fact.
As of today, Sr. is also advocating an income tax on individual Washington State residents earning over $200K. Currently, WA has no income tax on residents.
Source: http://www.ballardnewstribune.com/2010/09/15/news/bill-gates... (includes some very interesting figures)