Longer term and larger scale it's suicide. It upsizes labor surplus and cheapens labor. Cheap labor downsizes wages and spending and markets and your whole economy.
Cheap labor allows an extreme concentration of wealth and a widening income gap.
Why not start ethnic cleansing all your minorities - but watch out, we're all part of some minority. Downsizing the workweek is sometimes bad short term and small scale, not always. Longer term and larger scale it downsizes labor surplus and makes labor expensive. Expensive labor upsizes wages and spending and markets and your whole economy. You don't avoid moderate inflation because that's part of the healthy narrowing of the income gap and deconcentration of wealth.