Because big employers are against it. Because it gives more leverage to labour, diminishes labour competition and raises the overall cost of labour, i.e. wages.

Because big employers are against it. Because it gives more leverage to labour, diminishes labour competition and raises the overall cost of labour, i.e. wages. And of course big employers have lots of political power. What big employers rather prefer is EITC which is a rather blatant way of getting the tax payer to subsidize their cost of labour. And these days governments are forbidden from doing anything in house. They are forced to contract everything to the lowest bidder in the private sector because the logic goes that it's cheaper that way.