As Far as the Separation of Church and State

We too often if we are imposing our church onto what maybe considered the state's domain. However, we as the church never seem to bat an eye when the state drastically curtails our domain and takes dominion over duties clearly given to the church. For instance, as believers we are told to take care of the widows and orphans multiple times throughout Scripture. Yet, we easily give that obligation over to the state through reliance on Social Security and Social Services. I suppose the general welfare system would be another large example. Decorating towns for Christmas might be a small, more debatable option. If we are truly excited about the non-ordained celebration of our Savior's birth, wouldn't we gladly volunteer our time and money to Deck the Highways, as it were?