Once the basic necessities have been achieved, future income is only lightly connected to well-being. democrats generally seek to tax future income to finance programs that meet basic needs, including food, clothing shelter, retirement security and health care. republicans, in contrast, seek to protect future income from taxation, often at the expense of meeting the basic needs of the less fortunate. so which of our two main political parties is more concerned with achieving broad happiness, and which party is more concerned with fulfilling selfishness?