Business' are a bit of a responsible for the increase in price, but it is mostly the people who run and their greed. At the end of the day these companies are still making a ton of money, why are they increasing the price? What happens is that lets assume there is a company that sells a product for 10 bucks and they make 1 billion dollars a year right? So the costs increase, and then they spend some more this year because of pandemic, and even sell a bit less, now they are making 100 million dollars.
In order to prevent that they increase the price to 12.40 and they decrease the product size as well and fire thousands of workers and now they are making 150 million dollars instead of 100, they are still not making 1 billion, but they declined to make 100 million and for that extra 50 million profit they decided it was okay to charge more and fire people. That's what is wrong.
No one runs a business for charity. If the business is not profitable, then why anyone should go through all the pains? The rich can simply invest in treasury bonds and see their net wealth increasing without any effort. And let's not forget the fact that a large share of the businesses are facing bankruptcy as a result of this pandemic. If a company is able to sell their product at a premium price (take Apple for example), that is because of the exceptional quality of that product, and due to the brand name that was built over the years.