Whether long-term care costs, which often include nonmedical caregiver or semiskilled home care, should also receive more support through government programs is another challenging issue.

Compared with Mr. Noguchi’s invariably elegant sculptures, Mr. Sachs’s works look as if they were created by a manic, semiskilled handyman in his basement workshop.

Unskilled or semiskilled workers like Mr. Wang can be a bit choosier now as growth of the pool of migrant workers slows.