Getting into a real (I mean real) debate about who or what is useful or useless to society is dangerous. The scale definitely tilts toward socialism the more this type of thinking gains traction.
Just a rambling of socially useless or un-necessary endeavors:
-any type of work or occupation that involves being a middle man (feel free to add your own specifics)
-buying/selling of real estate for investment (only occupants should be permitted and only if approved by the government)
-renting property (government should provide funds for all to live in a residence)
-leasing automobiles (purchase only should be approved)
-design, manufacture or sale of any luxury automobile is un-necessary to society, only basic transportation should be permitted
-luxury retail in general (even semi-luxury is bad too)
-most Apple products (iPhones & iPods are useless to society), pay phones and/or basic celluar devices work fine)
-Twitter, Facebook, etc., totally useless waste of brain power
-music is not necessary except lullabyes to put babies to sleep, all else serves no purpose and should be made illegal
-movies likewise should be banned, those efforts should be put into something the government deems useful
-paid sports, benefits nobody except the athletes and those in the business, socially useless (we could be more socially useful if we didn't waste time watching sports)
-for profit utility companies, government should provide for all
-most retail is completely un-necessary and should be banned
-weather men, useless and un-necessary (go ahead, argue that one)
-think tanks, serve no one but themselves
-hairstylist, we can just lop off our own hair
-any other occupation derived solely for the benefit of making a living
.....what else......add your own, it'll be fun!
....if taxation is the point, just have a progressive tax system at the highest level.....if you make the money, pay the tax, if you don't, you don't pay....simple
.....stop the specific taxes on every little thing to tailor the country the way you think it ought to be
....if you don't like paying high taxes, don't make lots of money
....don't specify HOW the money ought to be made