According to a report in Arutz Sheva, Israel's Finance Ministry is now warning that the country will go bankrupt over the next few decades if haredim do not get actual secular educations and join the workforce:
…By 2059 the haredi population is projected to jump from 11.1% today to a full 26.6% [i.e., more than double in size], while the Arab population is expected to grow from 20.9% to 23.1%.
Partially as a result of the shifting populations, the annual gap between government spending and government revenues will reach 0.8 percentage points, equaling roughly 9 billion shekels ($2.3 billion), and as a result Israel's debt will start to hike.
While Israel's national debt has been shrinking and is now at 67% of the GDP, that trend will reverse around 2030 according to the projection, and by 2059 it will reach 88% - still a far cry from economically floundering states such as Greece, which is at 175%.
However, [Finance Ministry economist Assaf] Geva found that if Israel doesn't succeed in raising the retirement age of men and women to 69, the 0.8-point gap could actually be as high as 2.4 points equaling 25 billion (almost $6.5 billion) by 2059, raising Israel's debt-to-GDP up to 135%.
In the case that Israel fails in bringing more haredim and Arabs into the work force [Arab-Israeli households are often one-earner households where women stay at home and do not work; haredi households are often less than one-earner households with women working low-level part time jobs and men studying all day in yeshiva], it would reach a 3.4-point gap every year meaning 35 billion shekels ($9 billion), a scenario in which Israel would likely be at a ratio of over 170% as it was during the financial crisis of 1985.…
Note the emphasis here is that secular and non-haredi Israelis will have to work longer and pay more taxes to partially make up for the deficits caused by haredim and to a much lesser extent (and largely for different and less egregious reasons) Arab-Israelis.