One hesitates to make a recommendation to another country in different circumstances.
I'd go back to my comment in the very beginning on thinking about buying different things in different ways. We practise that very heavily in the United Kingdom, without doing it explicitly.
For our next combat aircraft, under GCAP, which we're doing with Japan and Italy, the companies are chosen, the partner countries are chosen and they're working as one team to develop what they know must be a competitive product. The competition comes not from within the top companies, but from having to compete in the future with China, which is in the export market, whatever the U.S. has to offer, and so on. That's a once-in-30-years contract, where there are a very small number of companies that are going to do it.
In other areas, like if you're buying rifles, a traditional open competition will work perfectly effectively. There are lots of people who sell them to you. You don't have, through life, big update costs, obsolescence management costs and so on.
You have to think through whether you have the right acquisition process for the particular thing you're buying. This is a hard thing for commercial officers within defence to get a grip on. What is suitable in one area may not be suitable elsewhere.
It's a very limited answer, but I did my best in the period allowed.