我们先看短文：

According to an independent poll of 200 charitable organizations, overall donations of money to nonprofit groups increased last year, but educational institutions did not fare as well as other organizations. Donations to international aid groups increased the most (30 percent), followed by donations to environmental groups (23 percent), whereas donations to educational institutions actually decreased slightly (3 percent). Meanwhile, all of the major economic indicators suggest that consumer spending is higher than average this year, showing that potential donors have ample disposable income. Therefore, the clearest explanation for the decline in donations to educational institutions is that people actually value education less than they did in the past.

Write a response in which you discuss one or more alternative explanations that could rival the proposed explanation and explain how your explanation(s) can plausibly account for the facts presented in the argument.