Anything that is financed with public money should also be available to the public. This call for justification is becoming stronger and more frequently heard.
Publications which become available via open access usually have a greater impact than similar articles which can only be consulted in Toll Access journals.
The role which Wageningen UR plays for developing countries is better served with open access. In developing countries, there is definitely a lack of quality information. Open access can help improve the situation.