US federal budget currently allocates around 1 trillion dollars for various welfare programs. NASA's entire budget is 32 billion. Please explain how gutting all space-related activities to boost federal social services by a mere 3% is going to contribute meaningfully to solving your list of major issues.

Also bear in mind that this is federal social services. Once we tally state and municipal level social service programs, the amount of resources dedicated to space-related activities is a rounding error.

A society can do multiple things at a time, and it's a more efficient use of resources to do so. Progress made in an activity versus resources put into it is generally logarithmic or even asymptotic when investing extreme amounts of resources, so if you have a huge amount of resources to spend (like a country does), you can get more done in total if you spread them out a bit instead of focusing on one thing at a time. Sticking another billion dollars into fixing housing would have a negligible difference. Finding solutions to something like that requires experimentation, data gathering, and deliberation, which all take time. Putting people on the moon will not affect the passage of time for those of us on Earth. (And it hardly affects the passage of time for anyone on a rocket, as well.)

Those are political decisions independent from space travel.