>Because you live in a society which is a joint enterprise.
>
>Which means that I contribute toward things that are for the common good of society like maintaining roads, paying for police and fire departments and to charities to which I choose to donate. It does not mean that I am obliged to share my wealth with any Tom Dick or Harry who has less than I do for whatever reason, whether it is due to laziness or some other circumstance.

I'm bigger and stronger than you so I could choose not to contribute to the police because I have less need of them. You benefit from other peoples altruism in paying for things they may not need but you do. That society. You seem to be confusing libertarianism with I'mallrightjackinisiam.