This is simply wrong. There is no other way to set economic, or really any political policy than by ideology. Politicians today like to claim that their policies is beyond ideology and solely informed by pragmatical concerns. Their policy is "whatever works", as Tony Blair liked to say.
The problem with this is that a political policy can only be said to work if it achieves a result you want. And what results you want of course depends on your ideology, the values and principles that you hold. Denying that you have an ideology when you are a political actor is merely obscuring the values that underlie your actions. Conservatives, liberals and socialists all have different value systems and therefore want different results.
Politics always raises questions and they need answers. These questions range from foundational and general, like "what is a good society?" and "how shall we achieve that society", to specific matters of policy. Answering them in a coherent and (nota bene) consistent way requires a system of values, an ideology. Philosophically, you can't consider each issue separately from the rest. Political action requires reasonable justification, and that justification must rest on a rational, coherent and consistent philosophical worldview,