The reasons are very simple to guess. 1. Indians wherever they are corrupt by nature, and therefore cheat. 2. America runs on trust, and so Indians exploit the system intelligently. 3. Use cheap illegal/legal immigrant labour to extract the maximum out of the system.
It won't be a surprise if a simple audit/check will result in most of the indian businesses to shut down.
The way i see it, all the above are not bad, as some people (who are intelligent enough) are making the maximum out of the system and making the laws of the land look like an Ass. And the law everywhere "Is really an Ass".