What would you change in a mixed market system to eliminate

What would you change in a mixed market system to eliminate problems encountered by countries in the past (or currently)?

Solution

following points considers the problem and rectification

for example.. a country like india and US spends too much on their defence industry so it slowing down economic growth

conclusion

Basically, the success or failure of a mixed economy would still depend on how it is managed. However, based on the listed above, we will be able to know whether it will do our country any good or just make situations even worse.