There can be a safety net for startups - college. If colleges could be refocused from teaching psychology to creating tech businesses, then student loans could be the financing. Anyone, including middle aged or seniors could go to college from 1-5 years, learn tech skills while creating a company from day 1, and have the current student loan industry finance it all. Olin College in MA and Waterloo University Independent Studies Program, Ontario, Canada, are two such examples that are close to the description (although not completely, because they focus on projects and not projects with business plan attached).