One is that the market is full of fakes,
government procurement is authentic goods, so the price is slightly higher;
Two is that there are people inside the backroom operation,
the winner of the bidder and the government insiders have dealings.
The problems you mention definitely exist, but they can't be generalized.
The government procurement price by the purchasing unit to put forward the purchase price, through the county and city levels of the financial sector review and approval, is not as simple as an individual to the supermarket shopping with one hand and one hand delivery.
The government procurement price includes the price of goods, delivery costs, installation and commissioning, after-sales service and other costs, so slightly higher than the market price is normal, but through the procurement bidding, competitors will boycott each other, you can suppress the price, the low-priced bidding is mainly single-source purchasing can also cut the price of the country to save money.