If you keep more than you need, yes. Socialism is not about hoarding wealth especially in the form of necessary goods.

Socialism is when you don’t have to do alienated work. And when noone else has to. Of course the productivity will be higher if you share the means of production with others. But it’s perfectly fine to work on your own too and harvest the fruit of your work. As you know, nobody gets rich by his own hands work, but you can get along. Capitalist exploitation starts when other people work for you and when you take the added value for your own benefits.