For starters, legislation can't override scarcity and the other basic laws of economics.

You want to reduce the price of oil and gas? Allow more drilling -- greater supply, generally speaking, leads to lower prices. When Biden shut down certain auctions for petroleum rights, he created the perception that he was against oil, which rattled the markets, leading to a spike in the price of crude oil, which lead to a spike in gasoline prices.

Healthcare, being a complex "system" (I use quotes, mainly because the US healthcare system isn't a system, it is more like a quilt...), getting the government out of the business of insurance would be a good start. Medicare regulations, due mainly to the law of unintended consequences, artificially hiked health care costs, screwing the uninsured and the private payor. To give an example, every hospital that participates in the Medicare program is required, by law, to have a single rate for each and every procedure they perform. They also not permitted to offer discounts to private payers for paying cash. They are permitted, however, to offer "contractual allowances" to insurance companies and are required to give the best of those rates to the government. Combine that with the history of insurance in America, and you have a real problem. People stopped looking at their medical bills back in the Sixties and matters have only gotten worse since then.

Why didn't the Democrats correct the taxes when they controlled the House and the Senate and the Presidency under Obama? They had the votes to do so and chose not to, mainly because a politician first concern is getting elected and their second one is getting re-elected.

The simplest way to do most of the above is to get government out of the way of most things,