Optimal Tax Policy for the Ultra-Rich in Indonesia: Enhancing Revenue and Social Equity. Scientax: Jurnal Kajian Ilmiah Perpajakan Indonesia, [S. l.], v. 8, n. 1, p. 103–116, 2026. DOI: 10.52869/298s1e72. Disponível em: https://ejurnal.pajak.go.id/st/article/view/926. Acesso em: 4 nov. 2026.