You don't find psychological manipulation to be nefarious?
That is not what the order says. Read it again.
What it is saying is that, for example, "default settings" of programs and policies should be changed. Instead of having people opting in a program as the default setting, people should be enrolled automatically and opting out should be the option.
People can make terrible choices in life for various reasons. Sometimes because of ignorance, sometimes its laziness, sometimes just bad info, etc. The book
Nudge presents the reasons why people make bad choices all the time. Just changing the defaults of programs helps people make better choices while preserving liberty of choice.
The book sites among varous example a governmental retirement plan in Sweden. From memory, the government gave people money to invest in retirement plans. People got to choose their portfolio from the various ones the private sector created for the public. If someone didn't choose any portfolio, the governement had expert make a portfolio for those people as the default setting instead of not investing the money at all. The governement understood that for various reasons people didn't always take care of their retirement as they should and that some people wouldn't take the time to choose a vehicule to invest their moneuy. This is better than not investing the money at all (don't you agree?), but it also turned out that people who used the governement's portfolio had a better return on their investments than 97%* of the people who choose their portfolio. People aren't great at making choices when it comes to investments because of biases, lack of education on investments, superstition, lack of experience in the investment sector, etc.
Of course, feel free to panick and see nefarious conspiracies were there aren't any.
*From memory.