The latest forecast by Statistics Korea puts the population in 2072 at 36.2 million, a 30% decline from the current 51.7 million, even though the fertility rate may recover a bit to 0.68 in 2026. The population is expected to fall every year starting in 2025.
https://www.samsung.com/global/ir/governance-csr/board-of-directors/
Samsung is a publicly traded company. Owning enough shares allows you to have enough voting power to significantly alter the result of the elections with a single vote.
In theory, yes, though the number of shares required to go against the Chaebol is just not feasible. There’s a reason South Korea specifically has a word for a specific group of Billionaire Capitalists, they are essentially untouchable.