Impact of SROs on Pakistan Economy

1-Should the use of SROs be only confined to formulation of procedures for implementing a tax law/laws?, 2-If the SROs allowing tax concessions were eliminated, would it not hurt those sectors which are currently benefiting from them?, 3-Is it true that SROs are a source of promoting a culture of rent-seeking?, 4- Can we find any positive results of SROs in any area like promotion of any specific industries, lowering the burden of taxation on social sectors or boosting exports?, 5-We would love to see examples of useful and harmful SROs? Economic impact of industry wise concessions, specific user concessions? Their impact on domestic industry?, 6- Does SRO culture make genuine commercial importers and SMEs uncompetitive?