You must have saved a lot of money after working for so long.

This stem comes from a joke, and the content of the joke is probably like this:

A man asked the master, "Master, I work very hard, but why can't I save money?"

The master asked him, "How do you save money?"

He replied, "I saved some of it, but I forgot where I saved it, then I saved it, then I forgot, then I saved it, and then I forgot ..."

The master was angry and said, "What a terrible way to save money! You are deceiving yourself! You should find a reliable bank! "

After the joke spread, it formed a stalk, that is, "You must have saved a lot of money after working for so long", which was used to ridicule those who had worked for many years but still could not save money.