1. It never seems to solve the problems it claims to address. When evidence against it is brought to bear, its advocates move the goal post.
2. There is never an established "end state." More and more areas of life magically become "rights" and then get added to its ever increasing responsibility.
3. It is commonly used as a means to buy votes and sow social dissent by convincing a receiving group that a productive group wants to take their livelihood away.
4. The US government is arguably not representative enough to be tasked with providing it. The nation is too large, the people are too divided, and the political system is too corrupt.
5. It relies on confiscation by the aforementioned unrepresentative entity. And those that never use it shoulder a disproportionate burden of its funding and implementation.
The idea that a social safety net is a Universal Good Thing needs to be reevaluated.