NEW DELHI: Finance Minister Arun Jaitley questioned the high interest rates on savings that translate into higher cost of lending and sluggishness in the economy with private investment yet to show signs of pickup. India, he said, has the “peculiar” characteristics of having “quite a high” percentage of domestic savings.“Now, whether domestic savings are only to be used by such instruments which give you a higher return and create an interest regime which is extremely costly and makes the economy sluggish, or higher returns are to be got from such instruments as funds, bonds, shares,” he said at a function to unveil a commemorative postage stamp to mark 140 years of BSE The FM said the Indian economy will need a lot of investment for a reasonably long period to bridge the infrastructure and industrialisation deficit that has existed for decades.