Last week, Mark Adderley became the third trust chief executive to depart in three years. He was among senior staff to receive pay rises that added £300,000 to the trust's salary bill last year.
The organisation is operating at a deficit of £800,000 and last year made 19 staff redundant. It has already been criticised by unions for awarding the large pay increases. The situation has drawn extensive comment in the Scottish press.
Martin Sime, chief executive of the Scottish Council for Voluntary Organisations, said events at the trust, which is an SCVO member, could have an impact on the sector.
"There are limits to which our sector can ape private sector practice," he said. "People, including donors, expect more equitable arrangements in the third sector.
"For some staff to be offered a cost-of-living award at a time when bosses are getting more in bonuses than staff earn in a year looks like the worst of the private sector.
"This week most of all it seems bizarre that the third sector should be encouraged to act like the private sector."
The future of Shonaig Macpherson, who chairs the trust's board and council of members, is likely to come under the spotlight at a meeting of the trust's council in Glasgow today.
Pay rises under fire at National Trust for Scotland
The National Trust for Scotland is coming under increasing pressure for awarding large salary increases to its senior executives.