Yes, they are beneficial and useful, ie they provide a use-Value, but the wages of a Worker will not reflect the exact input of their labor. Marx elaborates on this in Critique of the Gotha Programme.

“But “all members of society” and “equal right” are obviously mere phrases. The kernel consists in this, that in this communist society every worker must receive the “undiminished” Lassallean “proceeds of labor”.

Let us take, first of all, the words “proceeds of labor” in the sense of the product of labor; then the co-operative proceeds of labor are the total social product.

From this must now be deducted: First, cover for replacement of the means of production used up. Second, additional portion for expansion of production. Third, reserve or insurance funds to provide against accidents, dislocations caused by natural calamities, etc.

These deductions from the “undiminished” proceeds of labor are an economic necessity, and their magnitude is to be determined according to available means and forces, and partly by computation of probabilities, but they are in no way calculable by equity.

There remains the other part of the total product, intended to serve as means of consumption.

Before this is divided among the individuals, there has to be deducted again, from it: First, the general costs of administration not belonging to production. This part will, from the outset, be very considerably restricted in comparison with present-day society, and it diminishes in proportion as the new society develops. Second, that which is intended for the common satisfaction of needs, such as schools, health services, etc. From the outset, this part grows considerably in comparison with present-day society, and it grows in proportion as the new society develops. Third, funds for those unable to work, etc., in short, for what is included under so-called official poor relief today.

Only now do we come to the “distribution” which the program, under Lassallean influence, alone has in view in its narrow fashion – namely, to that part of the means of consumption which is divided among the individual producers of the co-operative society.

The “undiminished” proceeds of labor have already unnoticeably become converted into the “diminished” proceeds, although what the producer is deprived of in his capacity as a private individual benefits him directly or indirectly in his capacity as a member of society.

Just as the phrase of the “undiminished” proceeds of labor has disappeared, so now does the phrase of the “proceeds of labor” disappear altogether.

Within the co-operative society based on common ownership of the means of production, the producers do not exchange their products; just as little does the labor employed on the products appear here as the value of these products, as a material quality possessed by them, since now, in contrast to capitalist society, individual labor no longer exists in an indirect fashion but directly as a component part of total labor. The phrase “proceeds of labor”, objectionable also today on account of its ambiguity, thus loses all meaning.”

I know this was a wall of text, but it is useful for understanding the underlying makeup of Value, vs what is considered Useful, as they are distinct and separate.