Policy measures of the welfare state!

As the government interferes so much with markets, for example take the recent agri-debt waiver, imagine what else the government could do.
Sample a few thoughts:
The government can provide a minimum support level to stock market indices. Lets say there is a support for NSE Nifty at 5000, that ways, investors will not lose wealth.
The government can impose a ceiling to inflation levels at 5%, that ways prices wont rise.