This is not the best way to deal with an ageing population. Barcodes and similar types of identification have been exploited throughout history.
“A company in Iruma, north of Tokyo, developed tiny nail stickers, each of which carries a unique identity number to help concerned families find missing loved ones, according to the city’s social welfare office.”
Source. My analysis of ageing population policies in Japan, Sweden and Australia, on Social Science Insights.
The Other Sociologist 