One more comment on style: you are assigning an anonymous hash to a variable to push the hash onto an array. Why not just directly push the anonymous hash onto the array:

my @workers;
push @workers, {name => "Herb",   salary => 250000, job => "doctor"};
push @workers, {name => "Marge",  salary => 400000, job => "ceo"};
push @workers, {name => "Ingmar", salary => 50000,  job => "painter"};
[download]

It's minor (in this context), I know, but those little bits of memory consumed by things like $h hanging around can add up over the life of a program.