Most retired people today rely considerably upon the state to provide for their care- in most western countries the state provides free public health but the US does not appear to do this. US failure to provide public health leads to huge inequality and inefficiency. Interested to know how Libertarians plan to care for themselves in retirement- suspect many will rely heavily upon the state for pensions and some healthcare. Here in New Zealand everyone over 65 is entitled to a basic state pension of about NZ$500/week. It is not means tested. If you own your own home that's enough for a comfortable basic existence and the public health system also offers basic care free. Recently people caring full time for older or disabled family members won a court case where they win entitlement to being paid at least the minimum wage (~$1000/week) although the current right leaning government appears likely to fight ever paying this. If you do not have state provision of health and pensions you will almost inevitably have huge inequality in the well being of retired citizens. Here in New Zealand we are lucky to have universal basic entitlement with zero means testing. I suspect most Libertarians would take the government provided pension here in NZ - demonstrating the hypocrisy of Libertarians generally. In general government provision of health and welfare is more efficient that private dog eat dog systems.