They should be able to keep it because they would be found by government workers so at least they should give the finder quarter of the treasure, Because the government might need the money to support the country’s needs
I hope i have been able to convince and not to confuse you that government should keep at least 70% of the treasure found
The person who finds it, No matter how valuable or important the item is, Should be able to keep it. Just because the government finds something beneficial to them does not mean they have the right to take it from the rightful finder. If the government wants it SO bad, They can be like every other normal person and buy it from them. Otherwise they can go the other way.
If you find gold or oil or something valuable the government will come and snatch it away. It is wrong and very dubious but that is the way they work. Even finding gold or buried or sunken treasure and the government will want their cut.
It is what they do and you cn be assured that whatever you have left will be taxed until you have nothing left.