In all oecd countries governments collect revenues through taxes and redistribute this public money often by obligatory spending on social programmes such as education or health care their tax systems usually include tax expenditures provisions that allow certain groups of people such as small businessmen retired people or working mothers or those who have undertaken certain activities such as charitable donations to pay less in taxes. In all oecd countries governments collect revenues through taxes and redistribute this public money often by obligatory spending on social programmes such as education or health care their tax systems usually include tax expenditures provisions that allow certain groups of people such as small businessmen retired people or working mothers or those who have undertaken certain activities such as charitable donations to pay less in taxes. Wwwoecdorg publishing tax expenditures in oecd countries in all oecd countries governments collect revenues through taxes and redistribute this public money often by obligatory spending on social programmes such as education or health care their tax systems usually include tax expenditures provisions that. In all oecd countries governments collect revenues through taxes and redistribute this public money often by obligatory spending on social programmes such as education or health care their tax systems usually include tax expenditures provisions that allow certain groups of people such as small businessmen retired people or working mothers or those who have undertaken certain activities such as charitable donations to pay less in taxes