If you ask me, what Socialism is, I would answer: Art 18 (Labor basic law).
That is, the article that forbids employers from laying off employees without just cause.
Example: if the employer wants to get to profit maximization of his firm, by firing people, that is not a just cause. And the employer will be condemned to compensate the employee (worth up to 24 months of salary).
This is the basic principle of socialism, in my humble opinion.
Profit maximization at cost of people's unemployment is not tolerated, for it is uncostitutional.