Exactly the same happens in the UK. UK workers have their own accommodation and generally know the law.
So farmers and businesses slate the UK population as lazy scum. When it is a case of exploitation, arbitrage and ability to exploit workers.
So farmers hire Eastern Europeans to pick fruit and harvest food. They pay them the minimum wage but subject them to truck acts. Where sure we'll pay you £6.50 an hour (UK min wage) but we're going to have to charge £5/h for the caravan you have to stay in. Oh and we'll pay you in tokens which coincidentally can only be spent in the farm shop. As such workers end up on almost nothing.
I've witnessed this when I went wild camping around Lincolnshire.