syndicalism is a tendency of libertarian socialism. it was anarchists engaging in — typically violent — direct action that bred the popular labour movement, women’s suffrage, the abolition of racial segregation, and others.

How did a philosophy of minimized government involvement contribute to the regulations and enforcement mechanisms around our labor laws?

… because we live in a society? the State needs labour, but if all the labourers refuse to sell themselves until labour-buyers stop X, then the State may decide very graciously to abolish the practise of X. so the theory of syndicalism goes: rinse and repeat till you have eroded all the power of labour-buyers, and you can seize the workplace and cut out the State.