if the government intervention is greater then is it good or bad for economic freedom, government spending, trade and privatization?

I believe it is not so good for anything you have listed. It always means (eventually) that freedom is limited, governments increase in size and in influence, that trade is curtailed, and that privatization is a right of the past.

Mind you, that's just an opinion. There are some pieces of informal evidence available (like the growth of the influence of the IRS in the United States or the CRA where I live in Canada). There's also the difficulty of reading and interpreting government documents. Rome ran into real problems once the lawyers got into writing the law rather than the senators. What was once simple statements became hugely convoluted documents whose contents sounded like educated gibberish. Sound familiar?

If you pay income tax, do you fill out the forms, or do you get H and R block to do it for you? If you have more than just a simple income statement then you would be wise to let H and R block do it for you.