MPL exists in ICAO ICAO | FLS | FAQs

It's only a matter of time before the FAA adopts it too in order to standardize with ICAO. This doesn't mean an MPL will be flying right seat of a 757, but we might see them at Part 135 or smaller airlines while they gain experience for the larger ones. The problem of the pilot shortage is the high cost of training balanced against the first 10-15 years of pay an airline pilot can expect to receive.