This is the thing that liberalism fundamentally obscures. A small proletarian victory is transmogrified into a win for bourgeois society in general. It’s taken as a feature of capitalism that it endows workers with rights, rather than such rights being only a tentative moment in the struggle between labor and capital. To the extent that the average liberal admits that labor had to fight for those scraps, it’s believed that today’s capitalists have come-to-Jesus, in the same way that those same capitalists suddenly realized that slavery is wrong only a century or two ago.