To simulate working at the bank, terminals there would have an interaction similar to the /buy menus we have. At the top of the menu it would show a randomized and simple math operation. The menus would give the player a randomized 5 + 3 for example and a list of possible answers. A basic "quiz" menu to simulate the work that requires attention (You won't just speedrun answers without reading for cash). 5 correct answers and you get paid for the work with a minute cooldown.
For the office terminals, similar flow. It would randomize codes you need to select from the list such as "AXLZP", only one being correct. At the top it would tell you two characters included in the correct code, you need to figure which one is the right one 5 times so you can get paid.
That's an initial idea for HOW they would work. It's simple and functional, other ideas can be discussed but if we go with this one it's not too demanding to implement, we have a good base with existing and similar functions. I kept it simplified to not overcomplicate and demand much for these new activities IF accepted.