Pakistan itself is ranked in top 10 most corrupt countries by world audit organization and with a corruption score of 2.5 out of 10 in 2011. Promoting such a scheme would encourage further corruption. Investors indulged in black market activities would easily flow in their money in the stock market to make it white and viable. Also as the source of income would be unknown, it would open doors for foreigners to easily make all their black money white, hence legalizing illegal activity. This in return would bring in harsh claims for Pakistan, which would further exploit its position as a nation.
The economy is already facing a fiscal deficit thus this decision would result in further crisis which would worsen the economic position. Such a decision only raises one question in the minds of the general public, whether the government officials have agreed to the order in their own interest rather than the national economy. Therefore it is advisable for the government to consider its decision before the implementation.