It doesn't work at all.
Just because it is very hard to create jobs without having money does not mean that having money makes one create jobs.
In fact: Having money - no strings attached - removes the need to create jobs.
Why take risks and extend efford to create jobs (for sometimes ungrateful employees) when your living is secured by the money you have somewhere save?
Why would you risk that? Don't you think of your kids?
The trickle down theory only woks where money comes with an expiration date, when taxes on monetary funds are high and those on means of production are low.
That is currently not the case.
On topic: Conservationism and Capitalism are on different dimensions. They often coincide but not necessarily. If you have just two parties that oppose each other in everything purely on principle due to the setup o the voting system, then you obviously end up with two poles every time.
It is manly due to history that capitalism arised first and while it had many benefits it also let to a buildup of problems when unchecked - maninly extreme unequlities in wealth distribution and possibility to get rich exploiting the poor - and there is always someone cheap enough to do so. Thus one took account of the situation (and called it capitalism) then went on to formulate other concepts (Socialism among them). Parties were created to put forward some such suggestions or used these ideas to win votes. But then there were the ones who got rich already in the old system. Of course they didn't want to risk everything, they wanted to conserve the status quo - and they needed some more votes for their position, so they included a few things people liked that they wanted to conserve, too.
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The main problem is that money looses not enough value if you have huge amounts of it lying around somewhere doing nothing.
Progressive taxation is not steep enough and can be avoided too easily.
Thus there is no reason to risk and invest money to keep the value of your possesions up.
(Please note that I'm not proposing to rob the rich of all their possesions or something, I'm proposing to make the efford investing it worthwhile for them again.)