The effect of Iqta in the decline of Seljuqs

The Seljuqs after entering Iran, were managed by the elites of Iran and changed their tribal identity to a powerful empire by creating a steady army and a bureaucratic structure. By reclamation a long-standing tradition of Iqta and the transfer of the border provincial government to the slave amirs, Niẓām al-Mulk linked the two military and economic institutions in order to overcome the military costs, in addition to limiting the scope of the government and facilitating its administration. The power triangle of the Seljuq government was composed of the sultan, the minister and the Amir. Under the rule of the state, the Sultan always dominated the other two pillars, but during the period of decline, these were the Seljuq amirs who dominated the two other leaders.
This article seeks to analyze the impact of the iqta on the weakening of the monarchy and the ministry, claiming that the government has weakened the rule of Sultan by reducing the scope of the Sultan's political domination by creating semi-independent and sometimes outlaw provinces and rivaling the princes of the monarchy, refuse to send tax revenues, non-response to the ministry by dismissal, installation and killing of them.