Yes. Thank you for the question and the observation.
In my experience in working with participants living on lower incomes, absolutely, plain language is not something that is used. Maybe the customer sales representative has a quota to meet and will tell the participants at the mall, at a school, at the grocery store that if they sign up for this they can have a grocery gift card of $250. All they have to do is put down their name and they'll automatically get a card, so today's groceries are for free. Our participants would take what they say at face value.
Regarding the terms and conditions, I don't know about you, but for me they are quite lengthy. I scroll through them, and I just put a check mark and say that I consent and agree. I honestly do not read through all that, and in my observation of our participants, they also do not read through that.
Giving some discretion that says in plain language that, if you sign up for this debt, it means that you make minimum payments and in 23 years you'll pay it off, or something that will help them draw a conclusion, can be quite helpful.