NOTE: This post is probably useless for anyone other than the person I am replying to and the residents in Switzerland.
You can start a business, but it can not be registered as a GmbH or AG(These are like LLC or Pvt. Ltd. companies). From the day you quit your job, you have 3 months, during which you still have to pretend as if you are looking for a job. After that RAV(unemployment insurance dept.) gets off your back for 4 months during which you can devote yourself to setting up the business. At the end of 4 months, you have to either start pretending to be looking for a job again or give up your benefits.
I didn't really have to bother with all this because I really had to register my company. I also thought I was at a disadvantage due to me being a non-european founder but my lawyer assures me that this holds true for everyone. If you own shares in a GmbH or AG, you can not claim benefits from RAV.
P.S. I didn't read the article and my understanding of social security and unemployment insurance is quite hazy. That's why I hired a lawyer. There are people who know how to game the system either to start a company or to go on extended holidays ;-), so that is possible e.g. as an Indian I could have registered my company in India without having any impact on my social security in Switzerland. But financial wizardy and legal games is not what I intend to devote my attention to...