The St Vincent de Paul has called on the Government to ensure that those who can most afford it must take a greater share of the burden in December's Budget.
At a pre-Budget event in Dublin, SVP President Geoff Meagher said the people his organisation help cannot take any further cuts to their incomes as they are already struggling.
The charity has also published a booklet highlighting 13 different case studies, which it said demonstrates the effects of those who are struggling to cope financially.
It details one case where a mother moves tins of food from the cupboard to the fridge so her children think the family has more food than it actually has.
The St Vincent De Paul also called for the introduction of minimum pricing for alcohol, including a social responsibility levy.
It said the 50c prescription charge for Medical Card holders should be withdrawn.
The charity has also sought an urgent meeting with Minister for Social Protection Joan Burton, to ensure there are no further cuts to one-parent families in December's Budget.