There's no difference between "multi-stakeholder" and "self-regulation" by all.

Yes, but most people will probably understand "self-regulation" as voluntary regulation by the industry alone (i.e. to leave the financial markets regulation to the banks themselves).

"Dieu se rit des hommes qui se plaignent des conséquences alors qu'ils en chérissent les causes" Jacques-Bénigne Bossuet