My girlfriend just started at a nonprofit place here in DC, and watching her get worked like a pack mule (three nights in the first week getting off after 9:30 pm) is a good illustration of the significant price even white-collar types are paying for the collapse of the labor movement. In most other developed countries, such a situation would mean the organization is drastically understaffed. Check out this chart:
This might be an underestimate, since so many people are underemployed, meaning they would take full-time work if they could. Almost 86% of men and 67% of women work more than 40 hours per week.
It also occurs to me that nonprofits are not really immune to the broader trend in American business of wringing maximum labor out of one's employees, especially the salaried ones.