There are airlines and organisations that provide pilot training sponsorship.
So, for aspiring pilots you have a couple routes.
1) Apply to your countries Defence force, if you are an EU Passport Holder, you can also apply to many other EU countries.
2) Apply to an Airline that provide Commercial Pilot sponsorship.
3) Self fund your own commercial pilots licence with a flight training organisation.
As for the E-petition, I think it was worth asking, but shame for the Goverments responce. I guess if they did say "Yes, we will grant the student loans like for many other Higher Education course's" Then people who want to become driving instructors, scuba-diving instructors etc etc would also want the same thing to pay for there vocational training