Take how the private sector sell to councils for example, whether you're buying a product, SaaS or using a paid for service another way, this is generally how it works
Yes, I know that the API might be a database connection and there's lots other ways to integrate a service with a website or app, but let's look at this model for now. So the maximum number of clients the supplier can ever reach directly is 433 because that's the number of Tier 1 and 2 councils in the UK.
So lets make one change that enables another.
Now the API is using open standards. This in turn opens up a new market, as now suppliers can sell direct to the service user, because they can build in the knowledge that the API won't change. So now they've expanded their market from 433 councils to potentially everyone in the UK who uses digital services and even better they haven't lost their original market.
So why aren't the private sector lobbying for the creation of open standards in government?