These are cash transactions between professionals, so it really isn't a big change. There was a limit on unidentified cash deposits on 3000 (maybe they lowered this too, I haven't visited in years) and there's the limit in cash you can take into the plane which is similar in the USA and most places in the West IIRC.
This basically tries to avoid the typical 3000€ plumber/gardener payment in cash without declaring VAT or profit. Not that it will work, mind. It was illegal already, now it will be illegal on 2 accounts.