Yep and that problem becomes way more clear when you read the supplemental material that includes the actual question for measuring 'patience' [0 page 12-13]: They were given 5 rounds of the question "Would you take 100 Euro now or X euro in 12 months" Where X starts at 151 and goes through the tree on page 13 to assign you a patience score. The less you were willing to accept to wait 12 months the more patient you are.
This is clearly going to be affected a lot by how much 100 euros is relative to your current living situation.
This is clearly going to be affected a lot by how much 100 euros is relative to your current living situation.
[0] https://oup.silverchair-cdn.com/oup/backfile/Content_public/...