Lack of agreement is not a ground to get involved by the state. That is the problem.
Not just the lack of agreement, but the violence which has sometimes resulted from such. The state has to get involved because they have an obligation to keep the peace and restore public order.
If they end up having to do it too much, then they might feel political pressure to enact more proactive legislation which leads to even greater involvement in the private sector. Some of this may be necessary, even in a capitalist economy.