The joke is that Tony depends on exploiting lower class, working people. Hulk is suggesting investing in society, the poor.
The next panel is Hulk launched into space (which happens for a different reason in the movies), because Tony doesn’t want Hulk to be listened to, because Tony would lose money.
That does not make it any clearer.
The joke is that Tony depends on exploiting lower class, working people. Hulk is suggesting investing in society, the poor. The next panel is Hulk launched into space (which happens for a different reason in the movies), because Tony doesn’t want Hulk to be listened to, because Tony would lose money.