You're completely right. Private sector can be a powerful force in driving the open data movement. I just made the case on how the private sector is the next frontier for open data: http://blogs.worldbank.org/voices/next-frontier-open-data-open-private-sector
In fact, transparency in business practices can not only increase economic efficiency and mitigate risks, but also provide social and environmental benefits to the society. It's all about making Shared Value a reality to help achieve development and sustainability goals, especially in developing countries. That's what we're trying to do with the Open Private Sector platform. The idea is for the World Bank to serve as a catalyst to increase the role of private sector in leveraging open, reliable and accessible data to achieve economic, sustainability and governance impacts. Looking forward to engage on this.