Speaking at the Charities Aid Foundation's conference last week, Kennedy said there were 65 recommendations in the report.
"If only half of them are enshrined in legislation which obliges charities to comply, that will mean a very large amount of extra bureaucracy - which will be a particularly heavy burden on small charities."
He also said the report's recommendation that charities should no longer have to establish separate trading companies raised more concerns.
"I fear that this would blur the lines between charitable and commercial activity and erode the culture of voluntary giving."
