The EU has skipped paying farmers their benefits many times, so there are no more small farms left. Also the requirements and directives are so twisted, that family farms are required to be companies, which makes food production centralized.
Also Finland has no trade borders, the products going in an out are controlled and taxed by the EU. Russia used to be the main trade partner, but now it has pretty much halted.
Being part of the United States of Europe has very few benefits, but many problems. There are no more Government-owned companies or infrastructure left, privatization has taken over. Surprisingly, there are still many small businesses and farms functioning in Spain.
Why? What is the difference?
I suppose majority is cultural difference. Finnish people are usually pretty quiet and reserved, while Spanish people have close family and friend connections, also with the community.
Also people are less authority-obedient down south. The government has not helped the people before, so promises are not taken seriously. Banning singing and dancing in the streets got rid of most of the culture, hopefully it will return someday.
Surely the farming is way easier with warmer weather conditions, in Finland you get one harvest a year. So the food will not be the problem in Spain, in Finland it might become pretty scarce.
So also the paycheck does not matter, if there is nothing to buy. Tiny economy like Finland seems to get the short end of the stick.