Understanding the problem can lead us to the solution. Here are four of the most important causes of donor attrition: Increased competition -- more organizations are asking. Donors are consolidating their giving -- more money going to fewer organizations. Generational change: Boomers are rapidly replacing the WWII Generation as donors, and their needs are different -- more difficult for fundraisers to meet. Professional dilution. Not enough experienced, well-trained professional fundraisers to meet the growing demand.