"GST has been achieved after a decade. Multiple rates is an issue," Mohan said here at the 'Economics and Governance' event organised by Penguin publishers.
In addition to the tax rates, there is also a cess rate on luxury and sin goods like high-end cars, aerated drinks and tobacco and tobacco products which results in further variations in effective rates of taxation under the new indirect tax regime.
"Improving the two sectors is the biggest task before us in the next five years," he added. "Agriculture also has been completely neglected so far."