This is talking about the manna from the Lord. It was supernatural provision. In that case, there was no sowing and tending in order to reap. All they had to do was reap.

This verse is not encouraging communism.
Communism did not work in Jerusalem and it will not work in Corinth or your local town.

As a matter of fact, there is a history of communal experiments being attempted, none of which have survived.

We receive as much from the Lord spiritually as we want to receive because it is a free gift.
In the PhysicalRealm we receive the harvest according to what we have sown.