It is the gov's fault for relying on a service...that lacked a formal legal agreement that favors the gov, and even better that favors the citizens who pay taxes to said gov. But, i am not going to fault the gov folks too much, because hey they're human, and also because i'm pretty sure that the gov's intent (in deciding to use mechanisms like twitter) were not evil, quite the contrary no doubt. I fault such governments not because they're thinking evil, but rather poor decision-making. Also, you make a valid point that gov entities often lack enough tech personnel...However, i feel gov entities should at least have some small numbers of tech personnel who - not only install hardware, software - but advise governments on what technologies could fit the very specific needs of the citizens. Corporations for years/decades have technology advisors on staff; basically IT/tech/digital folks who don't go anywhere near software/hardware, and instead advise corporate entities on leveraging the most appropriate tech solutions for whatever scenarios come up for said corpporations. What any gov should always ask themselves in cases of deciding for platforms for emergency use: what mechanisms do we need in place that will scale to provide the service (emergency comms and/or broadcast) that our citizens need, etc..
To your point about having gov. be cost-effective, i fully agree with you! While i happily (yes, happily!) pay my taxes when gov uses them to good use (because it helps everyone in the long-term even if they dont realize it), i dislike poor decision-making by govs when they waste my tax dollars. So, i think the issue is not so much that govs can not afford to make long-term proper decisions of choosing scalable, appropriate tech platforms...but rather, that many govs simply make poor choices, or don't know how to make a choice, and then rely on ther wrong people to help make bad choices.
As the point about faxes...the U.S. also relies on fax as the approved "private" communcation system within healthcare...Not because gov doesn't move fast enough nor because someone made a bad tech decisioin...but we use faxes in american healthcare because someone made a bad tech decision AND THEN proceeded to explicityl cement that decision into law!
Overall, i blame gov, but not too roughly...but i also blame our gov/political leaders for not thinking properly long-term, and often relying too much on private entities...entities who do not always have the same incentives alignbed with citizens. Ok, ok, i'm off my soap box now. Thanks for your patience! :-)