A lot of their success is due to their tactic of rushing into the enemy without any care for supply lines and logistics. This often worked to their advantage but most of those early wins were not sustainable in the long run. It gave the impression that they were more powerful than they actually were.
If only it was just the public sector. I do agree with you, but the problem is cultural. It’s not just the government. None of the big or smaller corporations or companies are investing either.