Current Israeli policy is that if you are Jewish, you are NOT ALLOWED TO WORK until you serve in the army. If you attempt to engage in gainful employment you will be arrested and/or conscripted. As a consequence most hareidi males once they are full fledged adults either work “off the books” or in jobs that allow them to remain “Bnei Yeshiva” (such as being teachers). If the zionists were concerned about hareidim being employed in the official economy, they would LEGALIZE WORK for non-veterans (the way they do for frum women and Arabs, who are allowed to work without being in the army.
If the zionists wanted hareidim to help defend their country, they would offer to opportunties to serve in the army without harassment or discrimination. As it is many hareidim do serve, because they are so highly motivated they serve in spite of discrimination (similar to many African Americans who served in the American military in the Civil War thru WWII era, in spite of horrific discrimination).
The reality is the efforts to draft hareidim are motivated by a hope that after three years in the army they will “see the light” and give up a lifestyle based on Torah and Mitsvos, based on the their past success in turning most religious recruits into non-Shomer Shabbos. They are probably wrong, but that’s another story.