fall through the cracks in the system

「そのシステムの中では全く無視される」。

今回で8回目になる、ABCの'The Drum Unleashed'の記事から。

'The constant blame-shifting is at the root of many of the issues facing international students, who meanwhile fall through the cracks in the system while those in positions to enact real change are too busy dodging responsibility'

ちなみに、'dodge responsibility'は「責任を言い逃れる、曖昧なことを言う、はぐらかす」。