Leftists, would you support legislation that mandated citizens invest their idle capital?

I ask this question because I read a lot of leftists crying about "greedy" people and such who are sitting on a huge pile of cash and not "creating jobs" like they should be doing. So, I ask, if private citizens willingly choose to sit on the sidelines and not do the right thing and "create jobs", should government force them to do so? Furthermore, if government mandates that they do so and they refuse, should government simply confiscate that idle cash for the common good?