Someone (doctors, lawyers, corporations, someone) with a lot of money is willing to fork it over to Wikipedia for something that isn't available right now, and they should probably figure out what that something is.
Begging all the time is a bit silly for the 5th largest site on the internet.
NPR is IMHO the best radio station in the USA, and that's how they get their funding.
If anything I think it may be the other way around - advertising is a stupid way for organizations that need to be unbiased to get their money, begging is the only way to get money with integrity for that sort of organization.
To be honest, though, it's not my problem.