Do you think the players just like to play in those top European leagues clubs? The players are chasing good career so that they can play in those good clubs. If they are not chasing career, they could just stay in the country league if it is about passion. There is nothing like passion when it comes to money, but the players can enjoy playing in the clubs they are.
Players get paid based on what they bring to the table and clubs are Willing to offer such amounts because of the results they expect from such a player, for example, players like Harry Kane who is getting a whooping £400, 000 per week from Bayern Munich is rated as the world's best strikers, so the higher the money the bigger the player's ratings.
You can't expect clubs to offer huge amounts to average or poor-performing players, so the players themselves will have to first know their own worth and clubs price tag them as offers in the market.