PSLF is nothing like a bankruptcy, nor even arrogant or immoral IMO. More employers (besides the government) should offer such programs IMO. Education is something that should be rewarded, and not penalized, IMO.
The issue that I have with LK is that treating a borrower's life as collateral only works when such 'repossessions' are relatively isolated. For example, prior to the housing bust, it was relatively easy for banks to foreclose on borrowers who defaulted on their mortgages. However, once the defaults increased to a certain magnitude, public pressure prompted the government to step in and regulate, preventing lenders from timely repossession of the collateral even in instances where such was warranted.
The same thing is likely to occur with student loans if lenders have LK's attitude.