Well in one sense it is a bad thing because in the short term we will have monumental amounts of pilots under training loosing money along with hundreds of instructors being unemployed and also loosing wages.
Long term it would be a good thing.
I wouldn't say PPL schools should all have to do it. It would be size related and linked to the amount of money the students were required to deposite. IE if a school only got you to pay as you go there would be no need for them to either submit a bond or have esquire accounts or what ever they are called.