It seems like some people here are living in a different financial reality. Young people are not staying with their parents longer because they want to, but because they have no other option. Hence this trend that is happening all over the western world.
Housing prices, rent, food, health insurance, public transportation... starting an independent life is extremely difficult for young people these days, not only because the costs of living have risen so much, but also because average wages have not kept up with inflation at all and because low interest rates make it very difficult to save up money.
Of course there is a difference if your kid is just lying in bed all day doing nothing, but if he or she is going to college, or has a job and is doing all they can to build up their life, then I believe you should absolutely support them however you can.
I stayed at home until I was 27, which is when I was able to put down a Є35.000,00 deposit on an appartment after saving up for a decade or more. If I did not have that opportunity, I would have been stuck flushing my savings and wage down the drain by renting, and my financial future would have been in ruins. Now I get to live a stable life with little financial stress. Had I been kicked out at 18, who knows how badly things could have ended up.
I was grateful that I had support in that matter, and I hope some of you do the same for your kids as well, if they show the effort...