The OP makes it look like an evil, which it isn't. It's more of a "price discrimination" which makes everybody better off in the end.
- If you don't want to pay anything => PS+ gives you free access to 1/5 of a major AAA title.
- If you want the full game, then you have two options
a) The convenience of digital at the expense of PS+ Membership, costs $50, saving you $10
b) The traditional bluray option, costing exactly as usual, at $60
So, at the end of the day, consumer loses NOTHING. Just more options. If anything, (s)he gains free access to 1/5 of the game thru PS+
This is a really unfair light shed upon the PS+ offering.