Indeed. The backslashes before the pipes are also unnecessary.
perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In reply to Re^2: Using scalar variable in system set of commands by tobyink
in thread Using scalar variable in system set of commands by dtbach

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