Ben Wittenberg, director of policy at the DSC, argues that charities with income in excess of £1m, which make up a total of just 2 per cent of the sector, disproportionately influence government policy.
As a consequence, he says, policies that should be relevant to charities of all sizes are skewed towards larger charities.
"This focus from government has led to an agenda that suits the vocal, financially secure and organised minority," Wittenberg writes in the report The Interplay Between the State, Private Sector and Voluntary Activity.
He believes the Government should review the way it consults with the sector to produce more representative feedback.
The report also suggests that an assessment should be made about which parts of public service delivery the sector should engage with.