“Tuckered Out” is a colloquialism. Street urchins were called “Tuckers” and were the source of the nursery rhyme about Little Tommy Tucker….
“Little Tommy Tucker sings for his supper, What shall we give him? Brown bread and butter. How shall he cut it without a knife? How shall he marry without a wife?”
After the begger kids performed for their eats they had very little energy left for anything else… hence the term “Tuckered Out”.
Tuckers were viewed as being so low in society, they had no possibility to ever better themselves… hence the line about the wife and marriage.