This seems very unlikely to me, as Sweden is known to be one of the most social countries in Europe, and such a requirement would not only discriminate against the less well-off, but also against the elderly and disabled. It would be very surprising if a majority could be found for such a regulation in Sweden.
Sweden has one of the highest wealth disparity in europe, and it's increasing.
Also, as person living in sweden, let me tell you that marketing as inclusive is not the same as being inclusive. Spending money to let disabled people be able to get on trains, or checking that accessibility laws are respected (they aren't) are not things that happen in sweden.
Just last month I encountered a broken elevator at a train station. Which means no taking the train if you're on a wheelchair (and good luck with getting a refund). Even worse, if you actually were on the train, you're now stuck on the platform and can't leave until the next train shows up. Of course to buy the ticket for the next train you will need a smartphone.
