Trying to train everyone on the finer points of 508 and related accessibility is inefficient and a losing proposition. Take all of the money spent on 508 training and repurpose it to hire dedicated, experienced experts to help with publishing and accessibility compliance.
Agencies should receive funding for centralized, dedicated staff that have time and skills to review and publish web, print, video, etc. and make it 100% accessible.
Small agencies and units within larger agencies can share these resources to spread out costs.