I absolutely agree. I just like to be honest with my kids and if I start feeding them stuff like "we're basically in the same position as that homeless guy and the whole idea that we're in different situations is just a conspiracy by the ultra wealthy to keep us down"... Well, they're bright kids and will realize that I'm full of shit soon enough.
Also I think teaching them that we're lucky to have what we have and to give (both monetarily and our time) helping out those less fortunate than us is going to do a whole lot more to create solidarity with the rest of the working class than feeding them be conspiracy theories.