ペーパープラン

noun

armchair plan; impractical plan; paper plan

A plan that looks good on paper but is unrealistic or impractical in reality. Often used critically.

wasei-eigo (Japanese-coined English), from paper plan

• 彼かれの提てい案あんはペーパープランに過すぎない。

  His proposal is nothing more than an armchair plan.

• その改かい革かく案あんは机き上じょうの空くう論ろんならぬペーパープランだった。

  That reform plan was a paper plan, not just an armchair theory.