it is all too easy to blame the railway authorities When something does go wrong

it is all too easy to blame the railway authorities When something does go wrong

在一般情况下，too . . .to do 结构具有否定意义。
但是，当all too , but too , only too , quite too 与动词不定式连用时，就没有否定意义了。
It is all too easy to blame the railway authorities when something does go wrong.  
当事情出错时，很容易责怪铁路当局。 
类似例句：
They are but too glad to do so.

他们很高兴这样做。

go wrong前面加does表示强调的意思。意思是确实出错。all too表示“实在太”的意思。