It is not clear that whether it is useful for country growth or NOT?
Did government revenue has increased in comparison to VAT or NOT?
Does GST stopped the trade cycle of business?
I think in starting month of implementations traders, businessmen and others have paid more taxes due to less knowledge and fear and government tax collection increased but due to political interference and increased knowledge the tax collections reduced later on.
When E-way bill is made mandatory it will definitely increase the revenue collection of government.
Probable date of launching E-way bill is 1st April 2018 as per the unconfirmed news.
I think business houses will increase their margin under cover of E-way and needs