In terms of what makes a nation. We can reduce everything to borders and defense of those borders. Everything else effects the quality of the nation, But once a nation has no border it ceases to be a nation. So the agreement is we as citizens have a responsibility to contribute to society, The government has a responsibility to protect the sovereignty of its citizenry.
No, It should not be my responsibility to pay for something others want. I don't advocate that they be extorted (have their money obtained through force or threat) by the goverment for things I want so there's no reason I should be extorted by the goverment to pay for things they want.