Despite concerns that it doesn't encourage sustained giving, or that it fails to acknowledge underlying issues, the awkward dance between music and charity will continue, largely because the ultimate argument remains as compelling as it did 40 years ago.
As well as the benefit of building a good working environment, in the event that you are out of class for NQT time, off sick or on a course, you know that your classroom systems are being sustained, giving your pupils consistency, which is particularly vital in a primary classroom.
It's vital to see that support for such work is sustained, given the early stages of understanding and enormous significance of these trends.
Cinema owners have good reason to assume this robust increase will be sustained, given that the fourth quarter of the year includes Spectre, Star Wars: The Force Awakens and the final Hunger Games movie.
But aid workers in Laos query how long such a policy can be sustained, given that alternative crops often provide miserly returns from uncertain markets, not least because of Laos's appalling infrastructure.
"The issue going forward will be whether that confidence is sustained, given the troubled financial backdrop, and the apparent sputtering in consumer income growth," he wrote in a research note.
Wall Street analysts acknowledge the challenges confronting the retailing REIT's, and they are cautious about how long the latest performance can be sustained given the fact that the mall REIT's trailed other REIT's over the last two years, when the economy and retail conditions in general could not have been better.
"She doesn't know I had surgery; she can't attach to that part of it, but she'll call me now when she's getting dressed for school and she'll say, 'I put on this dress and now I look pretty like you.' " A skeptic would ask just how long such feelings of self-worth might be sustained, given their impetus.
Macleod (1988) showed the efficiency of team production can be sustained given sufficiently frequent monitoring and low mobility of members.
But Desmond couldn't sustain giving away OK! at a reputed cost of £250,000 a week, nor could he pay out £300,000 a week on TV advertising.
Some of the project-funded opportunities, such as big inter-school workshops and regional study visits or conference attendance might be difficult to sustain giving the limited budgets of the MoH and the medical schools.
