Vernon Philander is a direct beneficiary of the quota system. He was selected ahead of an in-form Kyle Abbott during the semi-final of the 2015 CWC, just because of the quota system. The captain (AB de Villiers) had open fights with the selectors, due to this decision. A lot of controversy was generated from this incident and Abbott retired from international cricket and secured a Kolpak deal with Hampshire. But the biggest blow to South African cricket happened when AB de Villiers quit international cricket.
Now after all this controversy, isn't it ironical that Philander himself secured a Kolpak deal? I don't know whether South Africa can lose any more of their experienced players to Kolpak. During the last decade or so, they have lost more than 50 of their top players.