You should read F.A Hayek's essay on The Paradox of Savings [1]. Creation of capital like factories, education creating new specialists, or new processes lowers the cost of production and leads to real economic progress. Excessive spending without capital creation does nothing except keeping factors of production wastefully employed when they could be put to other uses and always ends in inflation.

[1] https://mises.org/mises-daily/hayek-paradox-saving