I think more people would start their own businesses (not many, but more than now), simply because they could continue to work part-time somewhere to bring in money while growing their business. Part-time jobs usually don't offer health care benefits, so as of now it's either: (a) stay at current job full time for health benefits, and work on the business after hours, or (b) quit, have no health benefits, and work full time on the business in order to get up and running as quickly as possible (potentially at the cost of skipping important parts of the development process, marketing, etc.)
