No need of Hawala
According to the tax treaty between India and Mauritius, capital gains can only be taxed in Mauritius, the same treaty exist with 16 other countries. Thanks to its low 3% capital gains tax, quality regulatory framework, professional labor, geographical proximity, cultural affinities, and historical ties with India, Mauritius is the most attractive conduit for investments into India.
Money goes out thru that route a well
Source:wiki