Could you please tell us whether this type of Pension scheme is permitted in Islam, as many of us in my location have been signed up by our companies because it has been made mandatory by the government?

It is reported by Ibn abi Hatim that a Bedouin asked Rasool (saaw) “Is our Lord near, so that we call him silently or far away so that we call him loudly?” The Prophet (saaw) remained silent and Allah (swt) revealed the Ayah, (وَإِذَا سَأَلَكَ عِبَادِي عَنِّي فَإِنِّي قَرِيبٌ) “And when My servants ask you, [O Muhammad], concerning Me - indeed I am near.” [Dur manthoor 469/2; Tabari 158/2]

From the Question & Answer of the Ameer of Hizb ut Tahrir, Ata Bin Khalil Abu al-Rashtah - Part 9

...but what I want to ask about specifically is that they want to erect these panels over a land area of 15 dunums over old and new graves. Is it permissible to place these panels on this cemetery and next to the graves and on platforms that cover the graves from the top?