Even when a president disagrees with a particular law, it is still his responsibility to abide by it. This is because in the United States, no one, not even the President, is above the law. This is a very important concept, as it ensures that all the powers in the nation are limited by law, preventing them from becoming too powerful or too authoritarian.
The already poor countries look brightly on the idea of social conformity and taking care of each person. However the failures a socialism are seen when poor countries simply become poorer because there is decreased competition such as Venezuela.