If trickle-down economics were anything other than a cruel deception, the United States’ embattled working class would have many reasons to join Wall Street in singing “Happy Days Are Here Again.” Giant megabanks have been reporting huge profits for 2015’s first quarter, including $5.91 billion [3] at JPMorgan Chase (the largest bank in the country) and $5.8 billion at Wells Fargo. But trickle-down …