unsustainable

Still, there are concerns that the spending is unsustainable.

Among other challenges to be confronted by whoever is in charge, repeated warnings from financial watchdogs that levels of social spending in Scotland are unsustainable.

But it took a lot longer than they had expected, and meantime the bills came due and valuations became unsustainable.

This is an unsustainable system that feeds billions of taxpayer dollars to insurance companies.

Republican lawmakers have warned of unsustainable government spending.