In the US, you have to pay for that privilege. Your family will need land they own, someone to pay taxes on them, etc. At graveyards, most are 'leases.'
It's certainly true for Germany. At least any "normal" graveyard. I haven't really interacted with the "death system" yet (knock on wood) but yeah, graves have a TTL :P
edit: but I wouldn't phrase that as "not taking death seriously"
How do you mean?
I come from a part of Europe that takes death seriously and I walk past 250 year old graveyards every day. Saw a fresh grave in one recently
I can go visit the graves of the last 5 generations of my family