new york u.s. democratic presidential candidate bernie sanders tax benefit plan would raise income americans proposal single-payer healthcare would help generate record federal deficits two washington think tank say monday analysis tax policy center say although people would pay high tax sanders plan average household income would increase nearly 4,300 2017 propose benefit factor benefit include expansion social security government pension plan pay family leave free tuition public colleges ideas generate support sanders u.s. senator vermont seek become democratic nominee nov. presidential election wealthy percent households would end pay new tax get back benefit accord center joint effort run two washington-based think tank urban institute brook institution sanders plan would also increase federal deficits unprecedented level center say rely largely new estimate cost healthcare proposals publish monday separate analysis urban institute sanders propose single-payer healthcare system significant overhaul tweak democratic front-runner hillary clinton want make affordable care act signature policy achievement democratic president barack obama urban institute estimate sanders healthcare plan would require increase federal spend 32 trillion next decade new revenue source propose sanders cover half amount overall result would increase annual federal budget deficits 18 trillion next decade tax policy center say warren gunnels sanders policy director call new cost estimate wildly overestimate statement monday say analyse wrong assume state local governments would stop spend healthcare thereby shift 4.1 trillion cost federal government gunnels say report also underestimate sanders campaign forecast would trillions dollars save administration paperwork drug price see western countries single-payer systems sanders campaign estimate propose healthcare system would save trillion next 10 years compare current system sanders plan raise incomes also u.s. deficits analysts say