Lack of access to capital and lack of ability to network with the wealthy are the largest; I could (and am in the process of) getting a better job.
Working a job, realistically, is only going to get me so far, though, without one of those two factors. For what would be a modest investment on the part of most people I'd consider "wealthy", I could open a start-up where I'd make a reasonable wage AND have an ownership interest in the value of my ideas.
Similarly, connection to people in higher status positions would let me get a better-than-entry position.
Working a job, realistically, is only going to get me so far, though, without one of those two factors. For what would be a modest investment on the part of most people I'd consider "wealthy", I could open a start-up where I'd make a reasonable wage AND have an ownership interest in the value of my ideas.
Similarly, connection to people in higher status positions would let me get a better-than-entry position.