To have jam tomorrow means to have an empty promise that will never be fulfilled, much like how the person in this context is using big words to tell them it is going to be a  bright future that is an empty promise for many people.
Given the statement "You use big words to tell them it's going to be a bright future and they hope.", is the statement "You use big words to tell them it's going to be jam tomorrow and they hope." wrong?
- Yes
- No
- Unknown