The Trades Union Congress (TUC) has underlined the fact that big businesses pay less tax on their profits than individuals do on their hot food.
A comprehensive review of the nation's duty system was called for in order to ensure that everyone is paying their fair share.
Indeed, the TUC has already suggested the coalition could make its stance on tax more progressive, with its Midlands division arranging a campaign in opposition to the support for pasty tax from four local MPs.
General secretary of the organisation Brendan Barber said that high duties on individuals is particularly inappropriate in light of the rising cost of living.
"Big companies and wealthy individuals are now so adept at exploiting tax loopholes that they are seemingly able to choose their own tax contributions," he commented.
Mr Barber acknowledged a competitive tax system is important, but added that it should not favour large firms over people.