Now this is no longer true. Class society holds back further development and alienation is unnecessary. Alienation will only be eradicated when the division of labour takes place freely and in a society where labour is not bought and sold, and not compulsory. That is why only communism can liberate humanity. Under communism labour is freed.
Workers are the masters of the process of work and the products of their labour.
In collective, voluntary organisations they will choose what priorities they want for dividing up the social product. They will democratically decide on which material needs should be fulfilled and how much of these to postpone or trade-off against increased leisure time. Of course, nature will still impose relative restrictions on what we can achieve. But once we have secured the basic needs of all humanity then the solving of material problems ceases to be an absolute priority for us. We can free ourselves from the constant preoccupation with how to squeeze ever more out of a given moment.