The transition from the system described in the 19thC as “capitalism” to the modern mixed economy was an adoption of socialism (while it wasn't mostly adopted as a coherent program but instead a series compromises between different factions, as a deliberate program it would have been a form of what Marx described—and opposed—as “bourgeois socialism”. And the Nordic .model, including the form in Sweden, leans into some of the socialized elements more heavily than is typical, with notably strong social safety nets and public pensions.
The transition from the system described in the 19thC as “capitalism” to the modern mixed economy was an adoption of socialism (while it wasn't mostly adopted as a coherent program but instead a series compromises between different factions, as a deliberate program it would have been a form of what Marx described—and opposed—as “bourgeois socialism”. And the Nordic .model, including the form in Sweden, leans into some of the socialized elements more heavily than is typical, with notably strong social safety nets and public pensions.