neglect

[TheLibrary]

S _ L _ T _ R _ neglect,

another term for benign neglect, the unwritten hands off policy of the british government towards the american colonies in particular

[paulineward]

salutary

[Stretts]

May also be solitary neglect - which has numerous listing via Google

[grannyg]

or even salutory

[shaneystar2]

From wikipedia
Benign neglect, also called salutary neglect, is a term that has been used in retrospect to describe many historical actions, including Britain's hands-off attitude toward many of its colonies.