Consider Class::Tiny:

#!/usr/bin/env perl 

use strict;
use warnings;
use feature qw(say);

{
    package Employee;
    use Class::Tiny { name => 'Karl', empid => 311, pay => 200 };
    say __PACKAGE__;
}

say __PACKAGE__;

say for Class::Tiny->get_all_attributes_for("Employee");

my $wk = Employee->new();

say for ( $wk->name, $wk->empid, $wk->pay );

$wk->pay(3000);

say $wk->pay;

__END__
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See also Role::Tiny for further inspiration.

Minor Update: Added __PACKAGE__

Regards, Karl