Oh god. Is this a trend, because folks are trying it in my organisation too.
There are teams (silos) that work really well, and then there are teams that don't, people who aren't so experienced or competent, and projects without "resource".
So the solution was to break down the silos, which in practice means taking busy people from the teams that work well to do the work that the other teams and projects aren't able to do. The result of course, is that now everyone's fucked and there's even more work piled on top of the same people.
Don't do it. Pay the current rates, hire good people, train good grads, and grow the damn organisation. What you're doing will very likely result in good people who enjoy their work and their team leaving for somewhere that respects them a little more.