One of the particular features affecting the financial sustainability of a publicly funded system is the extent of public subsidisation of informal care.
The subsidisation of informal care has brought with it ongoing debate on both the efficacy and impact for individuals with varying needs of ADL support. In a study conducted by Kim and Lim (2012) findings suggest that institutional care is most cost-effective for individuals partially-dependent on support for several ADL's in that it led to reduction of informal care and medical expenditures whereas cost benefits for home care were higher among individuals that were completely dependent on ADL support through reduced spending on institutional support. Overall a shift from formal care to informal home care seems to be placated here as a financial target for sustainability.
Link: http://www.columbia.edu/~hk2405/ltc_for_publication_v04.pdf