The difference is that other than Theranos, none of those had politicians backing them up and protecting them from regulatory investigations like Wirecard had.
Theranos didn't either. There were a few influential people on the board, but they were more for providing prestige and legitimacy in front of investors and customers than pulling any strings in the government. The FDA and other agencies more or less did their job (which wasn't enough, but that's how regulation works in general in the USA).
