Steve Fouch, from the Christian Medical Fellowship and Christian Nurses and Midwives, also praised NHS plans to make more services available at a patient's local GP, reducing the need for them to go to hospital.
He told Premier's News Hour: "This latest proposal has some great ideas in it but I think it's going to really be a challenge for the government, who don't really want to increase the amount they're spending on the NHS.
"Here's the reality: any party that wants to be in government in this country cannot be seen to be cutting the National Health Service. That's where the British population are; people don't want to see the National Health Service cut.
"We had the Mid-Staffordshire situation and the real crisis about 'Is it really a caring service anymore? Why has there been so many failures of care? Why has there been so much abuse of patients?' So people's trust in the health service has been shaken.
"All the polls that have been done recently have put the NHS at the top of the British public's concerns for the coming election. It's the top priority that everybody's talking about.
"People want to see a good health service and they want to see it grow stronger and they don't want to see it cut back."
Mr Fouch's comments come as health officials announced that by 2020 the NHS will need another £30bn on top of the £100bn it already gets every year, otherwise its services will drastically suffer.
Steve Fouch, Christian Medical Fellowship and Christian Nurses and Midwives Association: