Liberals will never understand economics. Tax cuts actually increase money collected by the treasury. The less you tax an activity (businesses making money), the more it will occur, and more taxes are collected. Reagan's cuts proved that, and so have Trump's. The government takes in more money, not less.
Eliminating the annual baseline spending increases for so-called "entitlements" would go a long way toward balancing the federal budget. Those aren't "paid for" spending increases, but they happen every year without new legislation. On the occasions that baseline spending increases are actually reduced for a single year, liberals scream they are spending cuts, when in reality, they are reductions in spending increases. Spending still increases.