It is not uncommon for people to be working in the USA legally, and to be effectively barred from getting a Green Card, let alone citizenship, because of the current immigration process. If someone is here, working legally and paying taxes for more than 5 years, they should be allowed to apply directly for a Green Card without PERM certification or waiting for a "Priority Date"
They're here.
They're working.
They're legal.
Stop treating them like slaves.