The demands form part of a report from the parliamentary Public Accounts Committee into whether LIFT has been implemented effectively to date.
The MPs' report backs claims from the GPC that money is being diverted from existing streams to pay for LIFT, leaving those not in the schemes to struggle.
Most damningly the report claims that there is no way of knowing if LIFT is doing any good: 'The DoH has not yet developed a mechanism for evaluating LIFT.'
Edward Leigh, chairman of the Public Accounts Committee, said: 'Whether it represents value for money no one yet knows. It is essential that the DoH speeds up its development of a mechanism for evaluating LIFT.'
GPC chairman Dr Hamish Meldrum said: 'The report confirms some of the concerns we have with LIFT and we would welcome better evaluation.'
A DoH spokesman said: 'We agree there is a need to measure and demonstrate value for money and are considering measures to make value-for-money analyses more rigorous, particularly for very major LIFT schemes.'