...are positive utility in some circumstances ... and produces Y amount of utility

Of course, all this depends on how do you understand and calculate utility. Your statements are true for certain values of "utility" and not true for other values.

...where there is left-right disagreement; everyone supports policies that increase wealth and don't increase inequality or have other negative effects

That's actually not true. You are assuming that wealth and inequality are all that people are interested in. Let me suggest to you another value: power. For example, going a bit off the left-right axis we can find statists -- people who really like government power and think that the more the better. They don't necessarily care much about wealth (or about inequality either) -- what they care about is the power of central authority and that's the yardstick they'll be using to support (or not) certain policies.