Transformerless Power Supply High Current
According to Microchip Application Note 954 It is possible to create transformerless power supply circuits. The application note provides analysis information over some sample circuits and give formulas to calculate circuit parameters.

In the document, it is given 2 base models of circuits: 


Capacitive circuit
Resistive circuit


Given the formulas and calculations, for example if it is needed to use like 200mA output current, the power dissipation of some important components rise to 100Watts. Which means higher the output current increases the power dissipation of components for the circuit. Thus to get this amount of power, the feasibility of the idea becomes negative.

In English: It is possible but NOT logical.