The typical baby boomer couple had $135,000 in retirement savings last year, up from $111,000 in 2013 amid a rising stock market and a strong job market that has kept them employed, according to a report on the new Survey of Consumer Finances (SCF) by the Federal Reserve. Yet $135,000 – the balance for working couples who have a 401(k) – won’t go very far. This amount, held in both their 401(k)s and IRAs, will generate about $600 per month, said the SCF analysis by the Center for Retirement Research, which supports this blog. That’s obviously not enough to supplement most retirees’ primary source of income: their Social Security benefits, which are slowly eroding for various reasons. The purchasing power…