With the "blank check, check card" system, the question of having enough money is eliminated. The number one issue argued with married couples is over money. Many divorces happen over money. Many non-married people worry about money. A majority of bankruptcies occur due to health care bills that were life-saving and ruined people financially.
With this system, worries are eliminated. There is worker access to services of the economy. The mental health and physical health problem associated with worry is cured.