Well it's not like the proposal is to divert 34% of the GDP into a black hole. A state cannot afford to divert 34% of its resources (materials, workforce, etc.)

Well it's not like the proposal is to divert 34% of the GDP into a black hole. A state cannot afford to divert 34% of its resources (materials, workforce, etc.) to build a fancy statue. But the only direct cost of this proposal to the economy is a small administrative overhead. All the resources that these 34% GDP represent are still there, unspent, in the hands of people. We can argue of course about the indirect consequences to the economy, e.g. how it would affect the competitiveness of Switzerland if unpleasant jobs suddenly require a more attractive salary.