The US government spent like $3,800 billion for 2011, and around $19 billion of that was on NASA. That's 0.5%. The peak NASA budget ever was like 4.5% of the total budget when humans were going to the moon. Sometimes unifying behind a cause is just what humans need. And understanding the vastness of space can put earthly problems into perspective.
In comparison, almost $700 billion was spent on defense, around $700 billion was spent on social security, $600 billion for unemployment, welfare, other. Over $700 billion for medicare and medicaid. Plus all the departments and agencies dealing with energy, food safety, etc. Plus all the state budgets that are not very related to space (instead things like roads, fire departments, etc).
And other countries and their space programs probably have similar percentages spent on space as the US.
So no, it doesn't appear to me that there is less interest in humanity, when hundreds and hundreds of times the money is spent on humans compared to that which is spent on space research.