Social Security and Medicare are not specifically ‘Biden Policies.’ They are US programs that have the benefit of actual statute.
Exactly so, in the grand scheme of things.
They are both run, however, by bureaucracies that have a great deal of input on HOW they affect you. What, for instance is covered by Medicare and how much is paid for a procedure, or how to calculate SS COLA, etc. Those are policies, if they are not dealt with in detail in statutes.
Its part of the continuity of policies, generally.
Arming Ukraine, is, I think, part of the broader continuous policy set that began in 1939-40, with US aid to China.