He probably is through some back-ass-channel. These kinds of assholes always play all colors, all cards and have backup plans. He still wants to cling to his little riches even if the political winds change again. Gotta be able to show receipts when that happens.
I'll never support a single Billionaire ever for any reason whatsoever. They're leeches and parasites to society, our species and planet.
Germany got a very, very, very strong car maker lobby who staunchly opposes anything public transport. Funnily enough, all infrastructure is crumbling, including autobahn bridges so their precious little cars will soon not be able to go vroom anymore anyway.