Donors attack "demented" charity tax plans © Reuters/Eddie Keough A group of 46 wealthy philanpthropists have attacked the Government's plans to cap tax relief on charitable giving. In a letter published in The Sunday Telegraph, the business leaders and representatives from worlds of the arts and education, warned the Government that good causes will suffer if the cap is implemented. Sir John Ritblat, chairman of the Wallace Collection wrote: "I think the Treasury are absolutely demented and yes, it might affect how and what I choose to donate." Sir Vernon Ellis, chairman of the English National Opera and the British Council added: "For my own giving, I will not be able to make as much contributions. It will be much tougher and I will have to think very carefully about each donation. Under the new proposals, I certainly would not have been to give the several million pounds towards the restoration of the Coliseum. Good causes will suffer and some important projects in our cultural institutions will not take place, which will be a shame for the country. The signatories also include three members of the Sainsbury family and Gordon Roddick, the widower of Body Shop founder Anita Roddick. Between them the group make donations worth more than £100 million a year.