I get that until recently it was considered normal and relatively cheap, but you are literally paying someone else to make food for you.
It can’t be sustainable without exploitation of workers and/or animal welfare to have that available to the majority of people on a regular basis.
If you can only afford fast food as a luxury, to me that seems like a good thing.
Price increases for tobacco tend to prevent new users rather than convince current users to stop, but it is effective.