As walkouts by teachers protesting low pay and education funding shortfalls spread across the country, the small but growing movement to recruit teachers from overseas is another sign of the difficulty some districts are having providing the basics to public school students.

When we fail to invest in public services, living standards decline and communities suffer — overcrowded classrooms, understaffed prisons and more.

But let’s remember what originally made public-sector jobs middle class: labor unions. The right to bargain collectively has allowed millions of public service workers like my father, a Cleveland bus driver and a member of the Amalgamated Transit Union, to live the American dream.

When we kiss our loved ones’ goodbye to head to work, we don’t expect tragedy. Saturday is Workers Memorial Day, a time for all of us to remember those who went to work but unfortunately never returned home because they lost their lives while on the job. It’s also a day to remember that we must keep fighting for safe workplaces and continue to fight short cuts that lawmakers are pursuing as they turn back the clock on health and safety regulations in Congress.