Raising National Insurance contributions may be controversial because it affects those of working age rather than pensioners.
Professor Cam Donaldson, who is an expert in health economics at Glasgow Caledonian University, says the strategy could be a “political ploy” by the UK government to avoid the use of the word “taxation”.
The Conservative manifesto committed to no rises of income tax, National Insurance or VAT.
“My view would be to go for a fairer (more progressive) taxation system whereby the richer pay more on additional income earned,” said Prof Donaldson..
“Time has long since passed by the ability of National Insurance to pay for much of anything.