That is true, La Masia is not effective anymore, not producing quality players like they used to and this will become problem in future unless they change something.

Few years ago they lost one very interesting player that impressed me during Euro U21, Dani Olmo that won Euro with Spain team, while being one of their best players.He  did unexpected move, left their academy and went to Dinamo Zagreb where he developed into very good player, basically more offensive Modric, with a bit different skill set but same potential of becoming great player.They might bring him back, for maybe 30-40 million.That is nothing for them nowadays and i think they will have to get used to buying players like all the other top  teams.

But then again they  don't have strategy regarding buying finsished players either, when we saw what happened with Coutinho.Time will tell i guess.