[raxxorrax]

Even lorry drivers and especially care demands a lot from you if you come to a new country. You have to learn a lot, not only the language and how things are done in your new home. These are high demands, even if you think the occupation is easy.

Field workers are mostly part-time immigrants in most countries as the work is seasonal. Many that come will return home in winter or will need another occupation. What I want to say is that demands on the labour market are high.

Countries that regarded your suggestions don't have a good looking economy either. Where is this magically economy that imports immigrants in large numbers?

You will just make more jobs untenable by the normal population and it will only get worse, because it will suppress wages further so that no native workers with any prospects will want to work there. This already happened with many jobs, you might want to make sure that this doesn't extend to more industries.