Yes there should be a death tax. The death tax better called the "Estate Tax" or prevents people on their death beds from giving their family everything they own for free. There's a tax for give items worth over $10000. By giving money/items through a will is the best way to avoid that tax. Many immigrants who were successful and had a house in the US ended up giving their house to their relatives in other countries. For free. That wasn't efficient. SO, death tax is a tax on INHERITANCE GIFTS, not for you dying. There's a difference. People call it the 'death tax' because it has an evil connotation. They feel like maybe with this name, it can be abolished.
....hope that cleared some stuff up.