The state is the mechanism through which one class exerts its dominance over the others.
Bourgeois states are the enforcement arm of capital. When it offers improved conditions, it is merely a carrot to prevent you from taking actions that may jeopardize its power.
In a similar vein, proletarian controlled states can do the same, but the concessions go towards capital and the day-to-day ruling is on behalf of the workers.
If we want concessions that cannot be revoked, we must overthrow the bourgeois state and replace with a workers state. We cannot reform our way into a society where capital does not have near complete power.
Under feudalism: Left is about abolishing feudalism and the monarchy. Right is about preserving them.
Under capitalism: Left is about abolishing capitalism and the bourgeoisie. Right is about preserving them.