The Mullahs expend all the country assets for their nuclear programs.
A short look to the process of the Mullah's nuclear activities:
The Mullah's regime in Iran remained secret it's nuclear weapons program until 2002 when the National Council of Resistance of Iran held a press conference revealing a uranium enrichment facility at Natanz and a Heavy Water plant at Arak.
Those revelations, based on information provided by the social network of the People's Mojahedin Organization of Iran (PMOI), triggered an investigation by the International Atomic Energy Agency (IAEA) that eventually brought the regime's nuclear file before the UN Security Council for punitive sanctions.
The earliest NCRI revelations of the regime's nuclear projects date back to 1991, but these fell on deaf ears in the West. Since 2002, the NCRI has held dozens of press conferences in Western capitals revealing various top secret nuclear sites and information about key personnel involved in the regime's nuclear projects.