This is a band-aid that does nothing to fix the problem. This kind of "solution" was implemented in my country as well. The direct result was an increase in housing prices across the board.
The problem isn't that people are lacking the money for a downpayment. The problem is that volatility in the job market combined with ever increasing prices means you can't commit to buy a place of your own and pay it for the next 30 years, because the first time you lose your job you'll have lost all progress towards owning your home.
The fix you want is government-built housing. Make a neighborhood with government money. Sell the apartment for 1/3 of the price if the buyer is a teacher/fireman/doctor/other high-demand jobs in governmental employ. That way you fill the positions, the housing prices stop going up, and young people get to securely purchase a house before they're 50.
But of course, that's not the end-goal, is it? No the objective is to make more money for those who already own all the land and houses. And there's no need to spend time thinking about it, just make some fucking vouchers. We all know who'll end up cashing them in.
That's fucking rich, let me tell you. Because I'm an unwilling crowdstrike user who just today had another issue - we received a company-wide email that our PCs will be slowed down because crowdstrike is experiencing another botched update that makes it take up too much memory/CPU to do it's shady fucking background work.
I'm getting 5 second delays trying to snap a screenshot and they have the gall to complain about commentary. Here's some fucking commentary for you: I've hired interns who were more principled than your entire company when it comes to pushing to production. Wanna try doing the same for like, 30 consecutive days? Or are you branching out into selling "it has been X days since the last global incident" t-shirts? Cause at least that'd be one useful product climbing out of that shithole of a company.