The NHS will receive the largest cash boost in its history, following a deal to deliver an extra £384 million a week to the crisis-stricken health service.
"This will help stem further decline in the health service, but it's simply not enough to address the fundamental challenges facing the NHS, or fund essential improvements to services that are flagging".
"However, if this is to be funded with personal tax freezes and borrowing, then other United Kingdom departments will face funding squeezes to meet the costs of Brexit - and as a result any increases in health could be given with one hand and taken away with the other".
The NHS has been struggling to cope with funding shortages in recent years, particularly during the flu-ridden winter months.
On the question of raising income tax to help finance extra funds for the NHS budget, May was not able to explicitly say who would bear the brunt of these increases.
Of the increased investment, Mrs May is set to say: "The NHS will be growing significantly faster than the economy as a whole, reflecting the fact that the NHS is this Government's number one spending priority".
It's the end of the "sticking plaster" approach to health funding, promised Theresa May today.
She continued: "despite more funding, more doctors and more nurses, and great progress on treatments, our NHS is under strain".
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She is "wholly unqualified", said Karl Frisch, executive director of Allied Progress, an advocacy group. Mulvaney has steered the bureau in a more industry-friendly direction since he took over.
"There isn't a Brexit dividend", Johnson told the BBC on Sunday.
Director of the Institute for Fiscal Studies, Paul Johnson, also said the so-called windfall from European Union withdrawal would not materialise when the United Kingdom stopped paying more than £9 billion a year to Brussels due to the "divorce bill" of some £39 billion, and other economic factors.
"The debate over Brexit can be divisive, but that famous campaign promise can now unite us all: the British public voted for £350 million a week for the NHS, and that - and more - is exactly what this government will deliver", Hunt said. And it's right, because the NHS matters to people.
Much ado has been made about Theresa May's announcement this Monday that the National Health Service (NHS) will be receiving £20 billion by 2023.
Scottish Health Secretary Shona Robison said extra funding was welcome.
Mr Hunt dismissed findings from the Office for Budget Responsibility and Institute for Fiscal Studies that said there would be a net cost, not a dividend, from Brexit.
"The devil is in the detail and the Tories have form of cutting other budgets when they are passing on consequentials which leaves the Scottish Government less than the health consequentials from the UK Government", she said.
The PM said to ensure the NHS is "there when we need it" taxpayers across the nation will have to contribute "a bit more", without elaborating on the details.