When you work for someone, as in many areas, you trade sovereignty for wealth. Freedom for security. And so on.
This is always a tradeoff in your interactions with others. A promise is an obligation; commitment, "slavery" etc. if one wishes to put these things so inflammatorily.
The relevant question is: in this particular situation, how serious is this tradeoff?
In the case where there are many jobs you are never "starving", likewise when welfare exists. The governmental and economic context of a system isnt something extrinsic to the system that you can just dismiss: it is part of its functioning.
Yes, welfare may well be a precondition of a free market system to ensure that in extreme cases it isnt "starve or else". Or equally, a big dynamic economy might be a predoncition. Maybe our sorts of markets don't work with monopolistic employeers for the reasons he says.
However this does not generalize to work for a company as such which is always particular and always situated in an economic and political context which turns it from "slavery" to "having to get in by 9am".