They could use Linux and Libre Office. The government doesn't actually require anything fancier than that.

A lot of the dependencies on advanced features are artificial. The government creates unnecessary rules/bureaucracy for itself such that only specific providers are able to meet those rules. Bureaucracy and regulations are designed to be anti-competitive and benefit large companies who fund the political campaigns.

The government really is oppressing one set of people to benefit another set of people. It has always been like this. Nothing changed fundamentally in the past 300 years except which group of people is being oppressed and which group is doing the oppressing.

IMO, the government should force major social media companies to allocate a portion of their ad space to the government for campaigns. So that anyone can run for office and can get enough attention in the media to build momentum, starting from nothing.

Anyway, the problem is deep and sits alongside a whole bunch of other problems. All greatly exacerbated by the design of the monetary system which gives the government access to unlimited money.