What are the arguments for writing efficient programs even though hardware is relatively inexpensive?

Answer: Even though the hardware is inexpensive the writing of program is not efficient through this method as proper development of program is necessary for the clear execution due to factors like:-

The facility of writing program even the cost of hardware is less but it is not a free facility. It also has a slower processing for the execution of the program The construction of the efficient program is necessary for the compilation and execution of it rather than poorly constructed program is worthless and inefficient in working.