In many industries the reason employers have monopsopy power is regulations that prevents new players from eating the fat profit margins of incumbent players.
telecom, healthcare, real estate, legal services ......
Just like coders see every problem as a software problem - lawmakers tend to think any problem can be solved with more laws ! not realizing they are also playing the economic game theory charade.
In this case particularly, introducing more laws is going to make is harder for new players from gaining market share.
I am not also just making this up, France has some of the most progressive labor laws written with the best of intentions - but lawmakers failed to see the economical ramification of their laws. It made employers reluctant to hire full time workers - creating a painfully high unemployment rate.
A lot of American multinationals also have most of their growth happening outside US borders, I think stronger Unions and ill thought out reform is going to result in more aggresive offshoring.
I know supply side economic arguments has gone out of fashion - but by allowing entrepreneurs to more easily embrace globalization the same way as larger companies exploit it will more comfortably increase income without causing massive spikes in inflation.
This also includes less regulation so that workers can strike without legal trouble and cause trouble for employers, by dragging the process through the court system will just mean more money for lawyers - and large companies have deep pockets anyway to fight any potential lawsuit. Think about how things like fraud are already illegal but companies seem to get away with it anyway.
The only power labor has to collective withdraw it - which painfully show up in the balance sheet in every board room, its the only language capital understands.