NO CHANGE: Report: Giant life insurance lobby key force behind estate tax. “The report highlights the contrast between the public perception of estate tax proponents as fighting to break up wealthy, almost oligarchic families and the reality that a key force behind the tax is an industry for which ten percent of its revenues depend on maintaining the status quo. One of the most outspoken voices urging a higher estate tax, Warren Buffet, owns six life insurance companies, the report says.”