The neoliberal hope is that hoarded wealth will trickle down through investments.

It's not their hope, it's just one of the excuses invented by some Think Tank (probably in America and funded by somebody like the Koch brothers) to swindle the rest of people into thinking that the Neoliberal political ideology delivers something positive for more than just a small fraction of people.

If there is one thing I learned seeing the 2008 Crash from a front row position in the Finance Industry, is that every single Neoliberal pseudo-Economic saying (especially the stuff about Meritocracy) is complete total bollocks: when things got hard every single Neoliberal government out there chose to save and even increase the wealth of rich, using the law-making and executive powers of the state to imposed austerity for the rest to pay for it, and to manipulate their own currencies to boost asset values whilst in real terms income from work fell.

What they most definitelly did not do in any way form or shape was let the "constructive destruction of the Free Market" take its course.

Neoliberalism is what it does, not what it says on the tin.